Finding the Fourth Proportional to 663,818,644.91, 916,071,086.61 and 366,461,296.10

Step by Step Solution

1. Step 1: Write the proportion equation
   663,818,644.91 : 916,071,086.61 = 366,461,296.10 : x
2. Step 2: Convert to fraction form
   663,818,644.91/916,071,086.61 = 366,461,296.10/x
3. Step 3: Cross multiply
   663,818,644.91x = 916,071,086.61 × 366,461,296.10
4. Step 4: Simplify right side
   663,818,644.91x = 335,704,597,714,255,616
5. Step 5: Solve for x
   x = 335,704,597,714,255,616/663,818,644.91
6. Step 6: Final answer
   x = 505,717,337.55