Finding the Fourth Proportional to 106,665.30, 159,852.15 and 71,025.30

Step by Step Solution

1. Step 1: Write the proportion equation
   106,665.30 : 159,852.15 = 71,025.30 : x
2. Step 2: Convert to fraction form
   106,665.30/159,852.15 = 71,025.30/x
3. Step 3: Cross multiply
   106,665.30x = 159,852.15 × 71,025.30
4. Step 4: Simplify right side
   106,665.30x = 11,353,546,909.40
5. Step 5: Solve for x
   x = 11,353,546,909.40/106,665.30
6. Step 6: Final answer
   x = 106,440.87