Finding the Fourth Proportional to 8,590.72, 12,886.20 and 2,434.72

Step by Step Solution

1. Step 1: Write the proportion equation
   8,590.72 : 12,886.20 = 2,434.72 : x
2. Step 2: Convert to fraction form
   8,590.72/12,886.20 = 2,434.72/x
3. Step 3: Cross multiply
   8,590.72x = 12,886.20 × 2,434.72
4. Step 4: Simplify right side
   8,590.72x = 31,374,288.86
5. Step 5: Solve for x
   x = 31,374,288.86/8,590.72
6. Step 6: Final answer
   x = 3,652.11