Finding the Fourth Proportional to 1,065.69, 1,470.67 and 623.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.69 : 1,470.67 = 623.57 : x
2. Step 2: Convert to fraction form
   1,065.69/1,470.67 = 623.57/x
3. Step 3: Cross multiply
   1,065.69x = 1,470.67 × 623.57
4. Step 4: Simplify right side
   1,065.69x = 917,056.78
5. Step 5: Solve for x
   x = 917,056.78/1,065.69
6. Step 6: Final answer
   x = 860.53