Finding the Fourth Proportional to 89,538.13, 123,526.79 and 57,265.31

Step by Step Solution

1. Step 1: Write the proportion equation
   89,538.13 : 123,526.79 = 57,265.31 : x
2. Step 2: Convert to fraction form
   89,538.13/123,526.79 = 57,265.31/x
3. Step 3: Cross multiply
   89,538.13x = 123,526.79 × 57,265.31
4. Step 4: Simplify right side
   89,538.13x = 7,073,799,448.18
5. Step 5: Solve for x
   x = 7,073,799,448.18/89,538.13
6. Step 6: Final answer
   x = 79,003.21