Finding the Fourth Proportional to 105,406.92, 145,521.68 and 69,700.50

Step by Step Solution

1. Step 1: Write the proportion equation
   105,406.92 : 145,521.68 = 69,700.50 : x
2. Step 2: Convert to fraction form
   105,406.92/145,521.68 = 69,700.50/x
3. Step 3: Cross multiply
   105,406.92x = 145,521.68 × 69,700.50
4. Step 4: Simplify right side
   105,406.92x = 10,142,933,508.34
5. Step 5: Solve for x
   x = 10,142,933,508.34/105,406.92
6. Step 6: Final answer
   x = 96,226.45