Finding the Fourth Proportional to 10,375.40, 15,558.42 and 2,978.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,375.40 : 15,558.42 = 2,978.18 : x
2. Step 2: Convert to fraction form
   10,375.40/15,558.42 = 2,978.18/x
3. Step 3: Cross multiply
   10,375.40x = 15,558.42 × 2,978.18
4. Step 4: Simplify right side
   10,375.40x = 46,335,775.28
5. Step 5: Solve for x
   x = 46,335,775.28/10,375.40
6. Step 6: Final answer
   x = 4,465.93