Finding the Fourth Proportional to 105,417.67, 145,536.51 and 69,711.25

Step by Step Solution

1. Step 1: Write the proportion equation
   105,417.67 : 145,536.51 = 69,711.25 : x
2. Step 2: Convert to fraction form
   105,417.67/145,536.51 = 69,711.25/x
3. Step 3: Cross multiply
   105,417.67x = 145,536.51 × 69,711.25
4. Step 4: Simplify right side
   105,417.67x = 10,145,532,032.74
5. Step 5: Solve for x
   x = 10,145,532,032.74/105,417.67
6. Step 6: Final answer
   x = 96,241.29