Finding the Fourth Proportional to 14,002.80, 19,322.71 and 7,715.17

Step by Step Solution

1. Step 1: Write the proportion equation
   14,002.80 : 19,322.71 = 7,715.17 : x
2. Step 2: Convert to fraction form
   14,002.80/19,322.71 = 7,715.17/x
3. Step 3: Cross multiply
   14,002.80x = 19,322.71 × 7,715.17
4. Step 4: Simplify right side
   14,002.80x = 149,077,992.51
5. Step 5: Solve for x
   x = 149,077,992.51/14,002.80
6. Step 6: Final answer
   x = 10,646.30