Finding the Fourth Proportional to 1,100.79, 1,518.45 and 770.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.79 : 1,518.45 = 770.01 : x
2. Step 2: Convert to fraction form
   1,100.79/1,518.45 = 770.01/x
3. Step 3: Cross multiply
   1,100.79x = 1,518.45 × 770.01
4. Step 4: Simplify right side
   1,100.79x = 1,169,213.10
5. Step 5: Solve for x
   x = 1,169,213.10/1,100.79
6. Step 6: Final answer
   x = 1,062.16