Finding the Fourth Proportional to 1,423.37, 2,129.59 and 807.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,423.37 : 2,129.59 = 807.37 : x
2. Step 2: Convert to fraction form
   1,423.37/2,129.59 = 807.37/x
3. Step 3: Cross multiply
   1,423.37x = 2,129.59 × 807.37
4. Step 4: Simplify right side
   1,423.37x = 1,719,362.76
5. Step 5: Solve for x
   x = 1,719,362.76/1,423.37
6. Step 6: Final answer
   x = 1,207.95