Finding the Fourth Proportional to 72,810.47, 109,234.47 and 39,521.90

Step by Step Solution

1. Step 1: Write the proportion equation
   72,810.47 : 109,234.47 = 39,521.90 : x
2. Step 2: Convert to fraction form
   72,810.47/109,234.47 = 39,521.90/x
3. Step 3: Cross multiply
   72,810.47x = 109,234.47 × 39,521.90
4. Step 4: Simplify right side
   72,810.47x = 4,317,153,799.89
5. Step 5: Solve for x
   x = 4,317,153,799.89/72,810.47
6. Step 6: Final answer
   x = 59,293.04