Finding the Fourth Proportional to 284,171.94, 392,129.34 and 156,839.33

Step by Step Solution

1. Step 1: Write the proportion equation
   284,171.94 : 392,129.34 = 156,839.33 : x
2. Step 2: Convert to fraction form
   284,171.94/392,129.34 = 156,839.33/x
3. Step 3: Cross multiply
   284,171.94x = 392,129.34 × 156,839.33
4. Step 4: Simplify right side
   284,171.94x = 61,501,300,998.30
5. Step 5: Solve for x
   x = 61,501,300,998.30/284,171.94
6. Step 6: Final answer
   x = 216,422.85