Finding the Fourth Proportional to 4,645.98, 6,978.96 and 2,915.82

Step by Step Solution

1. Step 1: Write the proportion equation
   4,645.98 : 6,978.96 = 2,915.82 : x
2. Step 2: Convert to fraction form
   4,645.98/6,978.96 = 2,915.82/x
3. Step 3: Cross multiply
   4,645.98x = 6,978.96 × 2,915.82
4. Step 4: Simplify right side
   4,645.98x = 20,349,391.15
5. Step 5: Solve for x
   x = 20,349,391.15/4,645.98
6. Step 6: Final answer
   x = 4,380.00