Finding the Fourth Proportional to 2,763.52, 3,812.48 and 1,978.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,763.52 : 3,812.48 = 1,978.72 : x
2. Step 2: Convert to fraction form
   2,763.52/3,812.48 = 1,978.72/x
3. Step 3: Cross multiply
   2,763.52x = 3,812.48 × 1,978.72
4. Step 4: Simplify right side
   2,763.52x = 7,543,830.43
5. Step 5: Solve for x
   x = 7,543,830.43/2,763.52
6. Step 6: Final answer
   x = 2,729.79