Finding the Fourth Proportional to 156,896.83, 216,518.94 and 85,276.83

Step by Step Solution

1. Step 1: Write the proportion equation
   156,896.83 : 216,518.94 = 85,276.83 : x
2. Step 2: Convert to fraction form
   156,896.83/216,518.94 = 85,276.83/x
3. Step 3: Cross multiply
   156,896.83x = 216,518.94 × 85,276.83
4. Step 4: Simplify right side
   156,896.83x = 18,464,048,411.78
5. Step 5: Solve for x
   x = 18,464,048,411.78/156,896.83
6. Step 6: Final answer
   x = 117,682.74