Finding the Fourth Proportional to 156,665.98, 235,031.53 and 71,236.12

Step by Step Solution

1. Step 1: Write the proportion equation
   156,665.98 : 235,031.53 = 71,236.12 : x
2. Step 2: Convert to fraction form
   156,665.98/235,031.53 = 71,236.12/x
3. Step 3: Cross multiply
   156,665.98x = 235,031.53 × 71,236.12
4. Step 4: Simplify right side
   156,665.98x = 16,742,734,274.86
5. Step 5: Solve for x
   x = 16,742,734,274.86/156,665.98
6. Step 6: Final answer
   x = 106,868.99