Finding the Fourth Proportional to 12,086.84, 16,670.22 and 9,987.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,086.84 : 16,670.22 = 9,987.32 : x
2. Step 2: Convert to fraction form
   12,086.84/16,670.22 = 9,987.32/x
3. Step 3: Cross multiply
   12,086.84x = 16,670.22 × 9,987.32
4. Step 4: Simplify right side
   12,086.84x = 166,490,821.61
5. Step 5: Solve for x
   x = 166,490,821.61/12,086.84
6. Step 6: Final answer
   x = 13,774.55