Finding the Fourth Proportional to 72,321,221.54, 99,804,018.23 and 39,282,115.88

Step by Step Solution

1. Step 1: Write the proportion equation
   72,321,221.54 : 99,804,018.23 = 39,282,115.88 : x
2. Step 2: Convert to fraction form
   72,321,221.54/99,804,018.23 = 39,282,115.88/x
3. Step 3: Cross multiply
   72,321,221.54x = 99,804,018.23 × 39,282,115.88
4. Step 4: Simplify right side
   72,321,221.54x = 3,920,513,008,705,061.50
5. Step 5: Solve for x
   x = 3,920,513,008,705,061.50/72,321,221.54
6. Step 6: Final answer
   x = 54,209,717.78