Finding the Fourth Proportional to 105,149.88, 145,100.16 and 62,709.12

Step by Step Solution

1. Step 1: Write the proportion equation
   105,149.88 : 145,100.16 = 62,709.12 : x
2. Step 2: Convert to fraction form
   105,149.88/145,100.16 = 62,709.12/x
3. Step 3: Cross multiply
   105,149.88x = 145,100.16 × 62,709.12
4. Step 4: Simplify right side
   105,149.88x = 9,099,103,345.46
5. Step 5: Solve for x
   x = 9,099,103,345.46/105,149.88
6. Step 6: Final answer
   x = 86,534.61