Finding the Fourth Proportional to 1,557.06, 2,148.56 and 927.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557.06 : 2,148.56 = 927.50 : x
2. Step 2: Convert to fraction form
   1,557.06/2,148.56 = 927.50/x
3. Step 3: Cross multiply
   1,557.06x = 2,148.56 × 927.50
4. Step 4: Simplify right side
   1,557.06x = 1,992,777.50
5. Step 5: Solve for x
   x = 1,992,777.50/1,557.06
6. Step 6: Final answer
   x = 1,279.84