Finding the Fourth Proportional to 1,065.49, 1,470.12 and 623.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,065.49 : 1,470.12 = 623.47 : x
2. Step 2: Convert to fraction form
   1,065.49/1,470.12 = 623.47/x
3. Step 3: Cross multiply
   1,065.49x = 1,470.12 × 623.47
4. Step 4: Simplify right side
   1,065.49x = 916,575.72
5. Step 5: Solve for x
   x = 916,575.72/1,065.49
6. Step 6: Final answer
   x = 860.24