Finding the Fourth Proportional to 405,780,040.17, 559,977,540.71 and 220,141,055.88

Step by Step Solution

1. Step 1: Write the proportion equation
   405,780,040.17 : 559,977,540.71 = 220,141,055.88 : x
2. Step 2: Convert to fraction form
   405,780,040.17/559,977,540.71 = 220,141,055.88/x
3. Step 3: Cross multiply
   405,780,040.17x = 559,977,540.71 × 220,141,055.88
4. Step 4: Simplify right side
   405,780,040.17x = 123,274,047,079,884,384
5. Step 5: Solve for x
   x = 123,274,047,079,884,384/405,780,040.17
6. Step 6: Final answer
   x = 303,795,245.89