Finding the Fourth Proportional to 1,669,686,141.69, 2,504,527,773.57 and 426,116,505.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,669,686,141.69 : 2,504,527,773.57 = 426,116,505.60 : x
2. Step 2: Convert to fraction form
   1,669,686,141.69/2,504,527,773.57 = 426,116,505.60/x
3. Step 3: Cross multiply
   1,669,686,141.69x = 2,504,527,773.57 × 426,116,505.60
4. Step 4: Simplify right side
   1,669,686,141.69x = 1,067,220,623,051,796,608
5. Step 5: Solve for x
   x = 1,067,220,623,051,796,608/1,669,686,141.69
6. Step 6: Final answer
   x = 639,174,391.17