Finding the Fourth Proportional to 156,784.42, 216,362.91 and 85,163.86

Step by Step Solution

1. Step 1: Write the proportion equation
   156,784.42 : 216,362.91 = 85,163.86 : x
2. Step 2: Convert to fraction form
   156,784.42/216,362.91 = 85,163.86/x
3. Step 3: Cross multiply
   156,784.42x = 216,362.91 × 85,163.86
4. Step 4: Simplify right side
   156,784.42x = 18,426,300,576.43
5. Step 5: Solve for x
   x = 18,426,300,576.43/156,784.42
6. Step 6: Final answer
   x = 117,526.35