Finding the Fourth Proportional to 103,610.89, 142,983.24 and 61,172.15

Step by Step Solution

1. Step 1: Write the proportion equation
   103,610.89 : 142,983.24 = 61,172.15 : x
2. Step 2: Convert to fraction form
   103,610.89/142,983.24 = 61,172.15/x
3. Step 3: Cross multiply
   103,610.89x = 142,983.24 × 61,172.15
4. Step 4: Simplify right side
   103,610.89x = 8,746,592,204.77
5. Step 5: Solve for x
   x = 8,746,592,204.77/103,610.89
6. Step 6: Final answer
   x = 84,417.70