Finding the Fourth Proportional to 72,707.40, 109,061.37 and 39,443.13

Step by Step Solution

1. Step 1: Write the proportion equation
   72,707.40 : 109,061.37 = 39,443.13 : x
2. Step 2: Convert to fraction form
   72,707.40/109,061.37 = 39,443.13/x
3. Step 3: Cross multiply
   72,707.40x = 109,061.37 × 39,443.13
4. Step 4: Simplify right side
   72,707.40x = 4,301,721,794.89
5. Step 5: Solve for x
   x = 4,301,721,794.89/72,707.40
6. Step 6: Final answer
   x = 59,164.84