Finding the Fourth Proportional to 42,267.50, 63,423.12 and 21,491

Step by Step Solution

1. Step 1: Write the proportion equation
   42,267.50 : 63,423.12 = 21,491 : x
2. Step 2: Convert to fraction form
   42,267.50/63,423.12 = 21,491/x
3. Step 3: Cross multiply
   42,267.50x = 63,423.12 × 21,491
4. Step 4: Simplify right side
   42,267.50x = 1,363,026,271.92
5. Step 5: Solve for x
   x = 1,363,026,271.92/42,267.50
6. Step 6: Final answer
   x = 32,247.62