Finding the Fourth Proportional to 5,345.49, 7,376.72 and 2,987.61

Step by Step Solution

1. Step 1: Write the proportion equation
   5,345.49 : 7,376.72 = 2,987.61 : x
2. Step 2: Convert to fraction form
   5,345.49/7,376.72 = 2,987.61/x
3. Step 3: Cross multiply
   5,345.49x = 7,376.72 × 2,987.61
4. Step 4: Simplify right side
   5,345.49x = 22,038,747.50
5. Step 5: Solve for x
   x = 22,038,747.50/5,345.49
6. Step 6: Final answer
   x = 4,122.87