Finding the Fourth Proportional to 89,897.48, 123,988.42 and 57,635.18

Step by Step Solution

1. Step 1: Write the proportion equation
   89,897.48 : 123,988.42 = 57,635.18 : x
2. Step 2: Convert to fraction form
   89,897.48/123,988.42 = 57,635.18/x
3. Step 3: Cross multiply
   89,897.48x = 123,988.42 × 57,635.18
4. Step 4: Simplify right side
   89,897.48x = 7,146,094,821.67
5. Step 5: Solve for x
   x = 7,146,094,821.67/89,897.48
6. Step 6: Final answer
   x = 79,491.60