Finding the Fourth Proportional to 105,736.42, 145,915.96 and 60,428.46

Step by Step Solution

1. Step 1: Write the proportion equation
   105,736.42 : 145,915.96 = 60,428.46 : x
2. Step 2: Convert to fraction form
   105,736.42/145,915.96 = 60,428.46/x
3. Step 3: Cross multiply
   105,736.42x = 145,915.96 × 60,428.46
4. Step 4: Simplify right side
   105,736.42x = 8,817,476,601.15
5. Step 5: Solve for x
   x = 8,817,476,601.15/105,736.42
6. Step 6: Final answer
   x = 83,391.10