Finding the Fourth Proportional to 103,336.48, 142,704.28 and 89,055.36

Step by Step Solution

1. Step 1: Write the proportion equation
   103,336.48 : 142,704.28 = 89,055.36 : x
2. Step 2: Convert to fraction form
   103,336.48/142,704.28 = 89,055.36/x
3. Step 3: Cross multiply
   103,336.48x = 142,704.28 × 89,055.36
4. Step 4: Simplify right side
   103,336.48x = 12,708,581,028.94
5. Step 5: Solve for x
   x = 12,708,581,028.94/103,336.48
6. Step 6: Final answer
   x = 122,982.52