Finding the Fourth Proportional to 4,930.15, 7,386.86 and 2,978.25

Step by Step Solution

1. Step 1: Write the proportion equation
   4,930.15 : 7,386.86 = 2,978.25 : x
2. Step 2: Convert to fraction form
   4,930.15/7,386.86 = 2,978.25/x
3. Step 3: Cross multiply
   4,930.15x = 7,386.86 × 2,978.25
4. Step 4: Simplify right side
   4,930.15x = 21,999,915.80
5. Step 5: Solve for x
   x = 21,999,915.80/4,930.15
6. Step 6: Final answer
   x = 4,462.32