Finding the Fourth Proportional to 692,212,436.74, 955,253,209.30 and 378,946,650.72

Step by Step Solution

1. Step 1: Write the proportion equation
   692,212,436.74 : 955,253,209.30 = 378,946,650.72 : x
2. Step 2: Convert to fraction form
   692,212,436.74/955,253,209.30 = 378,946,650.72/x
3. Step 3: Cross multiply
   692,212,436.74x = 955,253,209.30 × 378,946,650.72
4. Step 4: Simplify right side
   692,212,436.74x = 361,990,004,253,766,144
5. Step 5: Solve for x
   x = 361,990,004,253,766,144/692,212,436.74
6. Step 6: Final answer
   x = 522,946,403.50