Finding the Fourth Proportional to 1,718.86, 2,372.02 and 972.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,718.86 : 2,372.02 = 972.87 : x
2. Step 2: Convert to fraction form
   1,718.86/2,372.02 = 972.87/x
3. Step 3: Cross multiply
   1,718.86x = 2,372.02 × 972.87
4. Step 4: Simplify right side
   1,718.86x = 2,307,667.10
5. Step 5: Solve for x
   x = 2,307,667.10/1,718.86
6. Step 6: Final answer
   x = 1,342.56