Finding the Fourth Proportional to 19,870.74, 29,811.15 and 8,025.30

Step by Step Solution

1. Step 1: Write the proportion equation
   19,870.74 : 29,811.15 = 8,025.30 : x
2. Step 2: Convert to fraction form
   19,870.74/29,811.15 = 8,025.30/x
3. Step 3: Cross multiply
   19,870.74x = 29,811.15 × 8,025.30
4. Step 4: Simplify right side
   19,870.74x = 239,243,422.10
5. Step 5: Solve for x
   x = 239,243,422.10/19,870.74
6. Step 6: Final answer
   x = 12,039.99