Finding the Fourth Proportional to 1,406.94, 1,938.87 and 992.22

Step by Step Solution

1. Step 1: Write the proportion equation
   1,406.94 : 1,938.87 = 992.22 : x
2. Step 2: Convert to fraction form
   1,406.94/1,938.87 = 992.22/x
3. Step 3: Cross multiply
   1,406.94x = 1,938.87 × 992.22
4. Step 4: Simplify right side
   1,406.94x = 1,923,785.59
5. Step 5: Solve for x
   x = 1,923,785.59/1,406.94
6. Step 6: Final answer
   x = 1,367.35