Finding the Fourth Proportional to 5,305.61, 7,321.88 and 2,947.89

Step by Step Solution

1. Step 1: Write the proportion equation
   5,305.61 : 7,321.88 = 2,947.89 : x
2. Step 2: Convert to fraction form
   5,305.61/7,321.88 = 2,947.89/x
3. Step 3: Cross multiply
   5,305.61x = 7,321.88 × 2,947.89
4. Step 4: Simplify right side
   5,305.61x = 21,584,104.20
5. Step 5: Solve for x
   x = 21,584,104.20/5,305.61
6. Step 6: Final answer
   x = 4,068.17