Finding the Fourth Proportional to 1,064.79, 1,598.67 and 978.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.79 : 1,598.67 = 978.93 : x
2. Step 2: Convert to fraction form
   1,064.79/1,598.67 = 978.93/x
3. Step 3: Cross multiply
   1,064.79x = 1,598.67 × 978.93
4. Step 4: Simplify right side
   1,064.79x = 1,564,986.02
5. Step 5: Solve for x
   x = 1,564,986.02/1,064.79
6. Step 6: Final answer
   x = 1,469.76