Finding the Fourth Proportional to 1,316.55, 1,973.91 and 622.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,316.55 : 1,973.91 = 622.83 : x
2. Step 2: Convert to fraction form
   1,316.55/1,973.91 = 622.83/x
3. Step 3: Cross multiply
   1,316.55x = 1,973.91 × 622.83
4. Step 4: Simplify right side
   1,316.55x = 1,229,410.37
5. Step 5: Solve for x
   x = 1,229,410.37/1,316.55
6. Step 6: Final answer
   x = 933.81