Finding the Fourth Proportional to 1,764.07, 2,434.32 and 978.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.07 : 2,434.32 = 978.06 : x
2. Step 2: Convert to fraction form
   1,764.07/2,434.32 = 978.06/x
3. Step 3: Cross multiply
   1,764.07x = 2,434.32 × 978.06
4. Step 4: Simplify right side
   1,764.07x = 2,380,911.02
5. Step 5: Solve for x
   x = 2,380,911.02/1,764.07
6. Step 6: Final answer
   x = 1,349.67