Finding the Fourth Proportional to 12,402.73, 18,587.58 and 5,815.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,402.73 : 18,587.58 = 5,815.06 : x
2. Step 2: Convert to fraction form
   12,402.73/18,587.58 = 5,815.06/x
3. Step 3: Cross multiply
   12,402.73x = 18,587.58 × 5,815.06
4. Step 4: Simplify right side
   12,402.73x = 108,087,892.95
5. Step 5: Solve for x
   x = 108,087,892.95/12,402.73
6. Step 6: Final answer
   x = 8,714.85