Finding the Fourth Proportional to 284,154.72, 392,136.72 and 156,830.28

Step by Step Solution

1. Step 1: Write the proportion equation
   284,154.72 : 392,136.72 = 156,830.28 : x
2. Step 2: Convert to fraction form
   284,154.72/392,136.72 = 156,830.28/x
3. Step 3: Cross multiply
   284,154.72x = 392,136.72 × 156,830.28
4. Step 4: Simplify right side
   284,154.72x = 61,498,911,595.88
5. Step 5: Solve for x
   x = 61,498,911,595.88/284,154.72
6. Step 6: Final answer
   x = 216,427.56