Finding the Fourth Proportional to 6,510.88, 8,985.57 and 3,678.78

Step by Step Solution

1. Step 1: Write the proportion equation
   6,510.88 : 8,985.57 = 3,678.78 : x
2. Step 2: Convert to fraction form
   6,510.88/8,985.57 = 3,678.78/x
3. Step 3: Cross multiply
   6,510.88x = 8,985.57 × 3,678.78
4. Step 4: Simplify right side
   6,510.88x = 33,055,935.20
5. Step 5: Solve for x
   x = 33,055,935.20/6,510.88
6. Step 6: Final answer
   x = 5,077.03