Finding the Fourth Proportional to 19,910.56, 29,862.12 and 8,061.20

Step by Step Solution

1. Step 1: Write the proportion equation
   19,910.56 : 29,862.12 = 8,061.20 : x
2. Step 2: Convert to fraction form
   19,910.56/29,862.12 = 8,061.20/x
3. Step 3: Cross multiply
   19,910.56x = 29,862.12 × 8,061.20
4. Step 4: Simplify right side
   19,910.56x = 240,724,521.74
5. Step 5: Solve for x
   x = 240,724,521.74/19,910.56
6. Step 6: Final answer
   x = 12,090.29