Finding the Fourth Proportional to 1,065.07, 1,470.72 and 785.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.07 : 1,470.72 = 785.79 : x
2. Step 2: Convert to fraction form
   1,065.07/1,470.72 = 785.79/x
3. Step 3: Cross multiply
   1,065.07x = 1,470.72 × 785.79
4. Step 4: Simplify right side
   1,065.07x = 1,155,677.07
5. Step 5: Solve for x
   x = 1,155,677.07/1,065.07
6. Step 6: Final answer
   x = 1,085.07