Finding the Fourth Proportional to 2,762.32, 4,139.42 and 2,178.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,762.32 : 4,139.42 = 2,178.72 : x
2. Step 2: Convert to fraction form
   2,762.32/4,139.42 = 2,178.72/x
3. Step 3: Cross multiply
   2,762.32x = 4,139.42 × 2,178.72
4. Step 4: Simplify right side
   2,762.32x = 9,018,637.14
5. Step 5: Solve for x
   x = 9,018,637.14/2,762.32
6. Step 6: Final answer
   x = 3,264.88