Finding the Fourth Proportional to 105,644, 145,762.62 and 62,633.57

Step by Step Solution

1. Step 1: Write the proportion equation
   105,644 : 145,762.62 = 62,633.57 : x
2. Step 2: Convert to fraction form
   105,644/145,762.62 = 62,633.57/x
3. Step 3: Cross multiply
   105,644x = 145,762.62 × 62,633.57
4. Step 4: Simplify right side
   105,644x = 9,129,633,263.15
5. Step 5: Solve for x
   x = 9,129,633,263.15/105,644
6. Step 6: Final answer
   x = 86,418.85