Finding the Fourth Proportional to 284,507.31, 392,615.51 and 155,443.01

Step by Step Solution

1. Step 1: Write the proportion equation
   284,507.31 : 392,615.51 = 155,443.01 : x
2. Step 2: Convert to fraction form
   284,507.31/392,615.51 = 155,443.01/x
3. Step 3: Cross multiply
   284,507.31x = 392,615.51 × 155,443.01
4. Step 4: Simplify right side
   284,507.31x = 61,029,337,142.86
5. Step 5: Solve for x
   x = 61,029,337,142.86/284,507.31
6. Step 6: Final answer
   x = 214,508.85