Finding the Fourth Proportional to 15,875.91, 21,909.56 and 8,802.18

Step by Step Solution

1. Step 1: Write the proportion equation
   15,875.91 : 21,909.56 = 8,802.18 : x
2. Step 2: Convert to fraction form
   15,875.91/21,909.56 = 8,802.18/x
3. Step 3: Cross multiply
   15,875.91x = 21,909.56 × 8,802.18
4. Step 4: Simplify right side
   15,875.91x = 192,851,846.83
5. Step 5: Solve for x
   x = 192,851,846.83/15,875.91
6. Step 6: Final answer
   x = 12,147.45