Finding the Fourth Proportional to 1,916.79, 2,642.73 and 1,562.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,916.79 : 2,642.73 = 1,562.31 : x
2. Step 2: Convert to fraction form
   1,916.79/2,642.73 = 1,562.31/x
3. Step 3: Cross multiply
   1,916.79x = 2,642.73 × 1,562.31
4. Step 4: Simplify right side
   1,916.79x = 4,128,763.51
5. Step 5: Solve for x
   x = 4,128,763.51/1,916.79
6. Step 6: Final answer
   x = 2,154.00