Finding the Fourth Proportional to 102,443.10, 141,318.78 and 68,440.72

Step by Step Solution

1. Step 1: Write the proportion equation
   102,443.10 : 141,318.78 = 68,440.72 : x
2. Step 2: Convert to fraction form
   102,443.10/141,318.78 = 68,440.72/x
3. Step 3: Cross multiply
   102,443.10x = 141,318.78 × 68,440.72
4. Step 4: Simplify right side
   102,443.10x = 9,671,959,052.72
5. Step 5: Solve for x
   x = 9,671,959,052.72/102,443.10
6. Step 6: Final answer
   x = 94,412.99