Finding the Fourth Proportional to 1,422.99, 2,131.69 and 934.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,422.99 : 2,131.69 = 934.56 : x
2. Step 2: Convert to fraction form
   1,422.99/2,131.69 = 934.56/x
3. Step 3: Cross multiply
   1,422.99x = 2,131.69 × 934.56
4. Step 4: Simplify right side
   1,422.99x = 1,992,192.21
5. Step 5: Solve for x
   x = 1,992,192.21/1,422.99
6. Step 6: Final answer
   x = 1,400.00