Finding the Fourth Proportional to 284,211.72, 392,215.32 and 156,887.46

Step by Step Solution

1. Step 1: Write the proportion equation
   284,211.72 : 392,215.32 = 156,887.46 : x
2. Step 2: Convert to fraction form
   284,211.72/392,215.32 = 156,887.46/x
3. Step 3: Cross multiply
   284,211.72x = 392,215.32 × 156,887.46
4. Step 4: Simplify right side
   284,211.72x = 61,533,665,327.89
5. Step 5: Solve for x
   x = 61,533,665,327.89/284,211.72
6. Step 6: Final answer
   x = 216,506.43