Finding the Fourth Proportional to 14,188.43, 19,580.49 and 7,815.69

Step by Step Solution

1. Step 1: Write the proportion equation
   14,188.43 : 19,580.49 = 7,815.69 : x
2. Step 2: Convert to fraction form
   14,188.43/19,580.49 = 7,815.69/x
3. Step 3: Cross multiply
   14,188.43x = 19,580.49 × 7,815.69
4. Step 4: Simplify right side
   14,188.43x = 153,035,039.89
5. Step 5: Solve for x
   x = 153,035,039.89/14,188.43
6. Step 6: Final answer
   x = 10,785.91