Finding the Third Proportional to 1,891.31 and 2,916.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,891.31 : 2,916.56 = 2,916.56 : x
2. Step 2: Convert to fraction form
   1,891.31/2,916.56 = 2,916.56/x
3. Step 3: Cross multiply
   1,891.31x = 2,916.56 × 2,916.56
4. Step 4: Simplify right side
   1,891.31x = 8,506,336.82
5. Step 5: Solve for x
   x = 8,506,336.82/1,891.31
6. Step 6: Final answer
   x = 4,497.58