Finding the Fourth Proportional to 89,607.15, 134,429.10 and 74,918.72

Step by Step Solution

1. Step 1: Write the proportion equation
   89,607.15 : 134,429.10 = 74,918.72 : x
2. Step 2: Convert to fraction form
   89,607.15/134,429.10 = 74,918.72/x
3. Step 3: Cross multiply
   89,607.15x = 134,429.10 × 74,918.72
4. Step 4: Simplify right side
   89,607.15x = 10,071,256,102.75
5. Step 5: Solve for x
   x = 10,071,256,102.75/89,607.15
6. Step 6: Final answer
   x = 112,393.44