Finding the Fourth Proportional to 105,308.16, 145,308.43 and 59,987

Step by Step Solution

1. Step 1: Write the proportion equation
   105,308.16 : 145,308.43 = 59,987 : x
2. Step 2: Convert to fraction form
   105,308.16/145,308.43 = 59,987/x
3. Step 3: Cross multiply
   105,308.16x = 145,308.43 × 59,987
4. Step 4: Simplify right side
   105,308.16x = 8,716,616,790.41
5. Step 5: Solve for x
   x = 8,716,616,790.41/105,308.16
6. Step 6: Final answer
   x = 82,772.47