Finding the Fourth Proportional to 1,247.95, 1,870.17 and 972.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,247.95 : 1,870.17 = 972.82 : x
2. Step 2: Convert to fraction form
   1,247.95/1,870.17 = 972.82/x
3. Step 3: Cross multiply
   1,247.95x = 1,870.17 × 972.82
4. Step 4: Simplify right side
   1,247.95x = 1,819,333.92
5. Step 5: Solve for x
   x = 1,819,333.92/1,247.95
6. Step 6: Final answer
   x = 1,457.86