Finding the Fourth Proportional to 103,111.38, 142,317.81 and 67,238.91

Step by Step Solution

1. Step 1: Write the proportion equation
   103,111.38 : 142,317.81 = 67,238.91 : x
2. Step 2: Convert to fraction form
   103,111.38/142,317.81 = 67,238.91/x
3. Step 3: Cross multiply
   103,111.38x = 142,317.81 × 67,238.91
4. Step 4: Simplify right side
   103,111.38x = 9,569,294,417.99
5. Step 5: Solve for x
   x = 9,569,294,417.99/103,111.38
6. Step 6: Final answer
   x = 92,805.42