Finding the Fourth Proportional to 166,047.76, 249,144.72 and 87,142.96

Step by Step Solution

1. Step 1: Write the proportion equation
   166,047.76 : 249,144.72 = 87,142.96 : x
2. Step 2: Convert to fraction form
   166,047.76/249,144.72 = 87,142.96/x
3. Step 3: Cross multiply
   166,047.76x = 249,144.72 × 87,142.96
4. Step 4: Simplify right side
   166,047.76x = 21,711,208,369.17
5. Step 5: Solve for x
   x = 21,711,208,369.17/166,047.76
6. Step 6: Final answer
   x = 130,752.79