Finding the Fourth Proportional to 156,956.86, 216,604.83 and 85,341.79

Step by Step Solution

1. Step 1: Write the proportion equation
   156,956.86 : 216,604.83 = 85,341.79 : x
2. Step 2: Convert to fraction form
   156,956.86/216,604.83 = 85,341.79/x
3. Step 3: Cross multiply
   156,956.86x = 216,604.83 × 85,341.79
4. Step 4: Simplify right side
   156,956.86x = 18,485,443,914.85
5. Step 5: Solve for x
   x = 18,485,443,914.85/156,956.86
6. Step 6: Final answer
   x = 117,774.04