Finding the Fourth Proportional to 3,947.98, 5,916.30 and 2,899.75

Step by Step Solution

1. Step 1: Write the proportion equation
   3,947.98 : 5,916.30 = 2,899.75 : x
2. Step 2: Convert to fraction form
   3,947.98/5,916.30 = 2,899.75/x
3. Step 3: Cross multiply
   3,947.98x = 5,916.30 × 2,899.75
4. Step 4: Simplify right side
   3,947.98x = 17,155,761.34
5. Step 5: Solve for x
   x = 17,155,761.34/3,947.98
6. Step 6: Final answer
   x = 4,345.46