Finding the Fourth Proportional to 105,189.55, 145,175.30 and 59,858.71

Step by Step Solution

1. Step 1: Write the proportion equation
   105,189.55 : 145,175.30 = 59,858.71 : x
2. Step 2: Convert to fraction form
   105,189.55/145,175.30 = 59,858.71/x
3. Step 3: Cross multiply
   105,189.55x = 145,175.30 × 59,858.71
4. Step 4: Simplify right side
   105,189.55x = 8,690,005,882.57
5. Step 5: Solve for x
   x = 8,690,005,882.57/105,189.55
6. Step 6: Final answer
   x = 82,612.82