Finding the Fourth Proportional to 1,806.17, 2,492.52 and 978.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,806.17 : 2,492.52 = 978.17 : x
2. Step 2: Convert to fraction form
   1,806.17/2,492.52 = 978.17/x
3. Step 3: Cross multiply
   1,806.17x = 2,492.52 × 978.17
4. Step 4: Simplify right side
   1,806.17x = 2,438,108.29
5. Step 5: Solve for x
   x = 2,438,108.29/1,806.17
6. Step 6: Final answer
   x = 1,349.88