Finding the Fourth Proportional to 105,117.26, 145,061.82 and 67,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,117.26 : 145,061.82 = 67,391.50 : x
2. Step 2: Convert to fraction form
   105,117.26/145,061.82 = 67,391.50/x
3. Step 3: Cross multiply
   105,117.26x = 145,061.82 × 67,391.50
4. Step 4: Simplify right side
   105,117.26x = 9,775,933,642.53
5. Step 5: Solve for x
   x = 9,775,933,642.53/105,117.26
6. Step 6: Final answer
   x = 93,000.27