Finding the Fourth Proportional to 42,061.30, 63,082.21 and 12,472

Step by Step Solution

1. Step 1: Write the proportion equation
   42,061.30 : 63,082.21 = 12,472 : x
2. Step 2: Convert to fraction form
   42,061.30/63,082.21 = 12,472/x
3. Step 3: Cross multiply
   42,061.30x = 63,082.21 × 12,472
4. Step 4: Simplify right side
   42,061.30x = 786,761,323.12
5. Step 5: Solve for x
   x = 786,761,323.12/42,061.30
6. Step 6: Final answer
   x = 18,705.11