Finding the Fourth Proportional to 677,590,698.72, 1,015,940,016.72 and 446,856,250.08

Step by Step Solution

1. Step 1: Write the proportion equation
   677,590,698.72 : 1,015,940,016.72 = 446,856,250.08 : x
2. Step 2: Convert to fraction form
   677,590,698.72/1,015,940,016.72 = 446,856,250.08/x
3. Step 3: Cross multiply
   677,590,698.72x = 1,015,940,016.72 × 446,856,250.08
4. Step 4: Simplify right side
   677,590,698.72x = 453,979,146,177,711,680
5. Step 5: Solve for x
   x = 453,979,146,177,711,680/677,590,698.72
6. Step 6: Final answer
   x = 669,990,227.19