Finding the Fourth Proportional to 1,066.79, 1,601.67 and 980.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.79 : 1,601.67 = 980.93 : x
2. Step 2: Convert to fraction form
   1,066.79/1,601.67 = 980.93/x
3. Step 3: Cross multiply
   1,066.79x = 1,601.67 × 980.93
4. Step 4: Simplify right side
   1,066.79x = 1,571,126.15
5. Step 5: Solve for x
   x = 1,571,126.15/1,066.79
6. Step 6: Final answer
   x = 1,472.76