Finding the Fourth Proportional to 1,314.37, 1,970.61 and 620.67

Step by Step Solution

1. Step 1: Write the proportion equation
   1,314.37 : 1,970.61 = 620.67 : x
2. Step 2: Convert to fraction form
   1,314.37/1,970.61 = 620.67/x
3. Step 3: Cross multiply
   1,314.37x = 1,970.61 × 620.67
4. Step 4: Simplify right side
   1,314.37x = 1,223,098.51
5. Step 5: Solve for x
   x = 1,223,098.51/1,314.37
6. Step 6: Final answer
   x = 930.56