Finding the Fourth Proportional to 9,987.30, 14,978.52 and 4,138.29

Step by Step Solution

1. Step 1: Write the proportion equation
   9,987.30 : 14,978.52 = 4,138.29 : x
2. Step 2: Convert to fraction form
   9,987.30/14,978.52 = 4,138.29/x
3. Step 3: Cross multiply
   9,987.30x = 14,978.52 × 4,138.29
4. Step 4: Simplify right side
   9,987.30x = 61,985,459.53
5. Step 5: Solve for x
   x = 61,985,459.53/9,987.30
6. Step 6: Final answer
   x = 6,206.43