Finding the Fourth Proportional to 5,348.17, 7,380.71 and 2,990.31

Step by Step Solution

1. Step 1: Write the proportion equation
   5,348.17 : 7,380.71 = 2,990.31 : x
2. Step 2: Convert to fraction form
   5,348.17/7,380.71 = 2,990.31/x
3. Step 3: Cross multiply
   5,348.17x = 7,380.71 × 2,990.31
4. Step 4: Simplify right side
   5,348.17x = 22,070,618.40
5. Step 5: Solve for x
   x = 22,070,618.40/5,348.17
6. Step 6: Final answer
   x = 4,126.76