Finding the Fourth Proportional to 619,521,142.55, 929,009,017.98 and 328,320,039.50

Step by Step Solution

1. Step 1: Write the proportion equation
   619,521,142.55 : 929,009,017.98 = 328,320,039.50 : x
2. Step 2: Convert to fraction form
   619,521,142.55/929,009,017.98 = 328,320,039.50/x
3. Step 3: Cross multiply
   619,521,142.55x = 929,009,017.98 × 328,320,039.50
4. Step 4: Simplify right side
   619,521,142.55x = 305,012,277,474,404,800
5. Step 5: Solve for x
   x = 305,012,277,474,404,800/619,521,142.55
6. Step 6: Final answer
   x = 492,335,541.97