Finding the Fourth Proportional to 105,418.67, 145,537.89 and 69,712.25

Step by Step Solution

1. Step 1: Write the proportion equation
   105,418.67 : 145,537.89 = 69,712.25 : x
2. Step 2: Convert to fraction form
   105,418.67/145,537.89 = 69,712.25/x
3. Step 3: Cross multiply
   105,418.67x = 145,537.89 × 69,712.25
4. Step 4: Simplify right side
   105,418.67x = 10,145,773,772.15
5. Step 5: Solve for x
   x = 10,145,773,772.15/105,418.67
6. Step 6: Final answer
   x = 96,242.67