Finding the Fourth Proportional to 8,987.06, 12,402.15 and 5,008.31

Step by Step Solution

1. Step 1: Write the proportion equation
   8,987.06 : 12,402.15 = 5,008.31 : x
2. Step 2: Convert to fraction form
   8,987.06/12,402.15 = 5,008.31/x
3. Step 3: Cross multiply
   8,987.06x = 12,402.15 × 5,008.31
4. Step 4: Simplify right side
   8,987.06x = 62,113,749.86
5. Step 5: Solve for x
   x = 62,113,749.86/8,987.06
6. Step 6: Final answer
   x = 6,911.47