Finding the Fourth Proportional to 1,163.39, 1,741.98 and 978.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,163.39 : 1,741.98 = 978.86 : x
2. Step 2: Convert to fraction form
   1,163.39/1,741.98 = 978.86/x
3. Step 3: Cross multiply
   1,163.39x = 1,741.98 × 978.86
4. Step 4: Simplify right side
   1,163.39x = 1,705,158.90
5. Step 5: Solve for x
   x = 1,705,158.90/1,163.39
6. Step 6: Final answer
   x = 1,465.68