Finding the Fourth Proportional to 12,602.14, 17,390.69 and 7,889.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,602.14 : 17,390.69 = 7,889.02 : x
2. Step 2: Convert to fraction form
   12,602.14/17,390.69 = 7,889.02/x
3. Step 3: Cross multiply
   12,602.14x = 17,390.69 × 7,889.02
4. Step 4: Simplify right side
   12,602.14x = 137,195,501.22
5. Step 5: Solve for x
   x = 137,195,501.22/12,602.14
6. Step 6: Final answer
   x = 10,886.68