Finding the Fourth Proportional to 6,810.50, 9,398.18 and 3,978.02

Step by Step Solution

1. Step 1: Write the proportion equation
   6,810.50 : 9,398.18 = 3,978.02 : x
2. Step 2: Convert to fraction form
   6,810.50/9,398.18 = 3,978.02/x
3. Step 3: Cross multiply
   6,810.50x = 9,398.18 × 3,978.02
4. Step 4: Simplify right side
   6,810.50x = 37,386,081.12
5. Step 5: Solve for x
   x = 37,386,081.12/6,810.50
6. Step 6: Final answer
   x = 5,489.48