Finding the Fourth Proportional to 105,136.52, 145,066.74 and 60,415.88

Step by Step Solution

1. Step 1: Write the proportion equation
   105,136.52 : 145,066.74 = 60,415.88 : x
2. Step 2: Convert to fraction form
   105,136.52/145,066.74 = 60,415.88/x
3. Step 3: Cross multiply
   105,136.52x = 145,066.74 × 60,415.88
4. Step 4: Simplify right side
   105,136.52x = 8,764,334,755.83
5. Step 5: Solve for x
   x = 8,764,334,755.83/105,136.52
6. Step 6: Final answer
   x = 83,361.47