Finding the Fourth Proportional to 103,386.78, 142,687.17 and 63,105.89

Step by Step Solution

1. Step 1: Write the proportion equation
   103,386.78 : 142,687.17 = 63,105.89 : x
2. Step 2: Convert to fraction form
   103,386.78/142,687.17 = 63,105.89/x
3. Step 3: Cross multiply
   103,386.78x = 142,687.17 × 63,105.89
4. Step 4: Simplify right side
   103,386.78x = 9,004,400,141.00
5. Step 5: Solve for x
   x = 9,004,400,141.00/103,386.78
6. Step 6: Final answer
   x = 87,094.31