Finding the Fourth Proportional to 6,978.27, 9,620.06 and 4,988.10

Step by Step Solution

1. Step 1: Write the proportion equation
   6,978.27 : 9,620.06 = 4,988.10 : x
2. Step 2: Convert to fraction form
   6,978.27/9,620.06 = 4,988.10/x
3. Step 3: Cross multiply
   6,978.27x = 9,620.06 × 4,988.10
4. Step 4: Simplify right side
   6,978.27x = 47,985,796.35
5. Step 5: Solve for x
   x = 47,985,796.35/6,978.27
6. Step 6: Final answer
   x = 6,876.46