Finding the Fourth Proportional to 1,179.08, 1,776.71 and 978.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,179.08 : 1,776.71 = 978.16 : x
2. Step 2: Convert to fraction form
   1,179.08/1,776.71 = 978.16/x
3. Step 3: Cross multiply
   1,179.08x = 1,776.71 × 978.16
4. Step 4: Simplify right side
   1,179.08x = 1,737,906.65
5. Step 5: Solve for x
   x = 1,737,906.65/1,179.08
6. Step 6: Final answer
   x = 1,473.95