Finding the Fourth Proportional to 15,499.08, 21,388.25 and 8,785.33

Step by Step Solution

1. Step 1: Write the proportion equation
   15,499.08 : 21,388.25 = 8,785.33 : x
2. Step 2: Convert to fraction form
   15,499.08/21,388.25 = 8,785.33/x
3. Step 3: Cross multiply
   15,499.08x = 21,388.25 × 8,785.33
4. Step 4: Simplify right side
   15,499.08x = 187,902,802.87
5. Step 5: Solve for x
   x = 187,902,802.87/15,499.08
6. Step 6: Final answer
   x = 12,123.48