Finding the Fourth Proportional to 1,065.30, 1,470.33 and 623.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.30 : 1,470.33 = 623.58 : x
2. Step 2: Convert to fraction form
   1,065.30/1,470.33 = 623.58/x
3. Step 3: Cross multiply
   1,065.30x = 1,470.33 × 623.58
4. Step 4: Simplify right side
   1,065.30x = 916,868.38
5. Step 5: Solve for x
   x = 916,868.38/1,065.30
6. Step 6: Final answer
   x = 860.67