Finding the Fourth Proportional to 12,589.08, 17,368.60 and 7,807.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,589.08 : 17,368.60 = 7,807.30 : x
2. Step 2: Convert to fraction form
   12,589.08/17,368.60 = 7,807.30/x
3. Step 3: Cross multiply
   12,589.08x = 17,368.60 × 7,807.30
4. Step 4: Simplify right side
   12,589.08x = 135,601,870.78
5. Step 5: Solve for x
   x = 135,601,870.78/12,589.08
6. Step 6: Final answer
   x = 10,771.39