Finding the Fourth Proportional to 1,762.78, 2,432.56 and 976.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,762.78 : 2,432.56 = 976.76 : x
2. Step 2: Convert to fraction form
   1,762.78/2,432.56 = 976.76/x
3. Step 3: Cross multiply
   1,762.78x = 2,432.56 × 976.76
4. Step 4: Simplify right side
   1,762.78x = 2,376,027.31
5. Step 5: Solve for x
   x = 2,376,027.31/1,762.78
6. Step 6: Final answer
   x = 1,347.89