Finding the Fourth Proportional to 1,389,621,736.58, 2,084,499,643.86 and 456,923,935.08

Step by Step Solution

1. Step 1: Write the proportion equation
   1,389,621,736.58 : 2,084,499,643.86 = 456,923,935.08 : x
2. Step 2: Convert to fraction form
   1,389,621,736.58/2,084,499,643.86 = 456,923,935.08/x
3. Step 3: Cross multiply
   1,389,621,736.58x = 2,084,499,643.86 × 456,923,935.08
4. Step 4: Simplify right side
   1,389,621,736.58x = 952,457,779,945,369,728
5. Step 5: Solve for x
   x = 952,457,779,945,369,728/1,389,621,736.58
6. Step 6: Final answer
   x = 685,407,945.83