Finding the Fourth Proportional to 5,290.42, 7,300.76 and 2,900.40

Step by Step Solution

1. Step 1: Write the proportion equation
   5,290.42 : 7,300.76 = 2,900.40 : x
2. Step 2: Convert to fraction form
   5,290.42/7,300.76 = 2,900.40/x
3. Step 3: Cross multiply
   5,290.42x = 7,300.76 × 2,900.40
4. Step 4: Simplify right side
   5,290.42x = 21,175,124.30
5. Step 5: Solve for x
   x = 21,175,124.30/5,290.42
6. Step 6: Final answer
   x = 4,002.54