Finding the Fourth Proportional to 1,764.10, 2,434.56 and 978.13

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.10 : 2,434.56 = 978.13 : x
2. Step 2: Convert to fraction form
   1,764.10/2,434.56 = 978.13/x
3. Step 3: Cross multiply
   1,764.10x = 2,434.56 × 978.13
4. Step 4: Simplify right side
   1,764.10x = 2,381,316.17
5. Step 5: Solve for x
   x = 2,381,316.17/1,764.10
6. Step 6: Final answer
   x = 1,349.88