Finding the Fourth Proportional to 14,066.52, 19,411.80 and 8,478.60

Step by Step Solution

1. Step 1: Write the proportion equation
   14,066.52 : 19,411.80 = 8,478.60 : x
2. Step 2: Convert to fraction form
   14,066.52/19,411.80 = 8,478.60/x
3. Step 3: Cross multiply
   14,066.52x = 19,411.80 × 8,478.60
4. Step 4: Simplify right side
   14,066.52x = 164,584,887.48
5. Step 5: Solve for x
   x = 164,584,887.48/14,066.52
6. Step 6: Final answer
   x = 11,700.47