Finding the Fourth Proportional to 12,589.18, 18,877.59 and 5,197.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,589.18 : 18,877.59 = 5,197.30 : x
2. Step 2: Convert to fraction form
   12,589.18/18,877.59 = 5,197.30/x
3. Step 3: Cross multiply
   12,589.18x = 18,877.59 × 5,197.30
4. Step 4: Simplify right side
   12,589.18x = 98,112,498.51
5. Step 5: Solve for x
   x = 98,112,498.51/12,589.18
6. Step 6: Final answer
   x = 7,793.40