Finding the Fourth Proportional to 105,423, 145,531.24 and 67,233.78

Step by Step Solution

1. Step 1: Write the proportion equation
   105,423 : 145,531.24 = 67,233.78 : x
2. Step 2: Convert to fraction form
   105,423/145,531.24 = 67,233.78/x
3. Step 3: Cross multiply
   105,423x = 145,531.24 × 67,233.78
4. Step 4: Simplify right side
   105,423x = 9,784,615,373.29
5. Step 5: Solve for x
   x = 9,784,615,373.29/105,423
6. Step 6: Final answer
   x = 92,812.91