Finding the Fourth Proportional to 103,690.52, 143,137.06 and 69,718.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,690.52 : 143,137.06 = 69,718.72 : x
2. Step 2: Convert to fraction form
   103,690.52/143,137.06 = 69,718.72/x
3. Step 3: Cross multiply
   103,690.52x = 143,137.06 × 69,718.72
4. Step 4: Simplify right side
   103,690.52x = 9,979,332,607.76
5. Step 5: Solve for x
   x = 9,979,332,607.76/103,690.52
6. Step 6: Final answer
   x = 96,241.51