Finding the Fourth Proportional to 1,725.01, 2,380.18 and 978.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,725.01 : 2,380.18 = 978.79 : x
2. Step 2: Convert to fraction form
   1,725.01/2,380.18 = 978.79/x
3. Step 3: Cross multiply
   1,725.01x = 2,380.18 × 978.79
4. Step 4: Simplify right side
   1,725.01x = 2,329,696.38
5. Step 5: Solve for x
   x = 2,329,696.38/1,725.01
6. Step 6: Final answer
   x = 1,350.54