Finding the Fourth Proportional to 7,098.88, 10,648.28 and 3,978.90

Step by Step Solution

1. Step 1: Write the proportion equation
   7,098.88 : 10,648.28 = 3,978.90 : x
2. Step 2: Convert to fraction form
   7,098.88/10,648.28 = 3,978.90/x
3. Step 3: Cross multiply
   7,098.88x = 10,648.28 × 3,978.90
4. Step 4: Simplify right side
   7,098.88x = 42,368,441.29
5. Step 5: Solve for x
   x = 42,368,441.29/7,098.88
6. Step 6: Final answer
   x = 5,968.33