Finding the Fourth Proportional to 105,689.12, 145,843.71 and 62,666.42

Step by Step Solution

1. Step 1: Write the proportion equation
   105,689.12 : 145,843.71 = 62,666.42 : x
2. Step 2: Convert to fraction form
   105,689.12/145,843.71 = 62,666.42/x
3. Step 3: Cross multiply
   105,689.12x = 145,843.71 × 62,666.42
4. Step 4: Simplify right side
   105,689.12x = 9,139,503,185.22
5. Step 5: Solve for x
   x = 9,139,503,185.22/105,689.12
6. Step 6: Final answer
   x = 86,475.35