Finding the Fourth Proportional to 1,314.48, 1,969.06 and 620.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.48 : 1,969.06 = 620.16 : x
2. Step 2: Convert to fraction form
   1,314.48/1,969.06 = 620.16/x
3. Step 3: Cross multiply
   1,314.48x = 1,969.06 × 620.16
4. Step 4: Simplify right side
   1,314.48x = 1,221,132.25
5. Step 5: Solve for x
   x = 1,221,132.25/1,314.48
6. Step 6: Final answer
   x = 928.99