Finding the Fourth Proportional to 1,557.72, 2,334.54 and 1,339.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557.72 : 2,334.54 = 1,339.80 : x
2. Step 2: Convert to fraction form
   1,557.72/2,334.54 = 1,339.80/x
3. Step 3: Cross multiply
   1,557.72x = 2,334.54 × 1,339.80
4. Step 4: Simplify right side
   1,557.72x = 3,127,816.69
5. Step 5: Solve for x
   x = 3,127,816.69/1,557.72
6. Step 6: Final answer
   x = 2,007.95