Finding the Fourth Proportional to 2,492.37, 3,439.39 and 1,430.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,492.37 : 3,439.39 = 1,430.31 : x
2. Step 2: Convert to fraction form
   2,492.37/3,439.39 = 1,430.31/x
3. Step 3: Cross multiply
   2,492.37x = 3,439.39 × 1,430.31
4. Step 4: Simplify right side
   2,492.37x = 4,919,393.91
5. Step 5: Solve for x
   x = 4,919,393.91/2,492.37
6. Step 6: Final answer
   x = 1,973.78