Finding the Fourth Proportional to 6,978.74, 10,468.71 and 1,981.13

Step by Step Solution

1. Step 1: Write the proportion equation
   6,978.74 : 10,468.71 = 1,981.13 : x
2. Step 2: Convert to fraction form
   6,978.74/10,468.71 = 1,981.13/x
3. Step 3: Cross multiply
   6,978.74x = 10,468.71 × 1,981.13
4. Step 4: Simplify right side
   6,978.74x = 20,739,875.44
5. Step 5: Solve for x
   x = 20,739,875.44/6,978.74
6. Step 6: Final answer
   x = 2,971.87