Finding the Fourth Proportional to 105,680.30, 145,844.82 and 62,685.29

Step by Step Solution

1. Step 1: Write the proportion equation
   105,680.30 : 145,844.82 = 62,685.29 : x
2. Step 2: Convert to fraction form
   105,680.30/145,844.82 = 62,685.29/x
3. Step 3: Cross multiply
   105,680.30x = 145,844.82 × 62,685.29
4. Step 4: Simplify right side
   105,680.30x = 9,142,325,201.31
5. Step 5: Solve for x
   x = 9,142,325,201.31/105,680.30
6. Step 6: Final answer
   x = 86,509.27