Finding the Fourth Proportional to 156,697.43, 216,241.83 and 85,077.42

Step by Step Solution

1. Step 1: Write the proportion equation
   156,697.43 : 216,241.83 = 85,077.42 : x
2. Step 2: Convert to fraction form
   156,697.43/216,241.83 = 85,077.42/x
3. Step 3: Cross multiply
   156,697.43x = 216,241.83 × 85,077.42
4. Step 4: Simplify right side
   156,697.43x = 18,397,296,992.48
5. Step 5: Solve for x
   x = 18,397,296,992.48/156,697.43
6. Step 6: Final answer
   x = 117,406.50