Finding the Fourth Proportional to 105,530.55, 145,639.82 and 60,209.53

Step by Step Solution

1. Step 1: Write the proportion equation
   105,530.55 : 145,639.82 = 60,209.53 : x
2. Step 2: Convert to fraction form
   105,530.55/145,639.82 = 60,209.53/x
3. Step 3: Cross multiply
   105,530.55x = 145,639.82 × 60,209.53
4. Step 4: Simplify right side
   105,530.55x = 8,768,905,111.48
5. Step 5: Solve for x
   x = 8,768,905,111.48/105,530.55
6. Step 6: Final answer
   x = 83,093.52