Finding the Fourth Proportional to 404,517,558.80, 558,028,574.52 and 245,705,420.72

Step by Step Solution

1. Step 1: Write the proportion equation
   404,517,558.80 : 558,028,574.52 = 245,705,420.72 : x
2. Step 2: Convert to fraction form
   404,517,558.80/558,028,574.52 = 245,705,420.72/x
3. Step 3: Cross multiply
   404,517,558.80x = 558,028,574.52 × 245,705,420.72
4. Step 4: Simplify right side
   404,517,558.80x = 137,110,645,676,218,464
5. Step 5: Solve for x
   x = 137,110,645,676,218,464/404,517,558.80
6. Step 6: Final answer
   x = 338,948,564.02