Finding the Fourth Proportional to 1,622.63, 2,238.82 and 992.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,622.63 : 2,238.82 = 992.93 : x
2. Step 2: Convert to fraction form
   1,622.63/2,238.82 = 992.93/x
3. Step 3: Cross multiply
   1,622.63x = 2,238.82 × 992.93
4. Step 4: Simplify right side
   1,622.63x = 2,222,991.54
5. Step 5: Solve for x
   x = 2,222,991.54/1,622.63
6. Step 6: Final answer
   x = 1,369.99