Finding the Fourth Proportional to 1,768.52, 2,650.80 and 947.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,768.52 : 2,650.80 = 947.72 : x
2. Step 2: Convert to fraction form
   1,768.52/2,650.80 = 947.72/x
3. Step 3: Cross multiply
   1,768.52x = 2,650.80 × 947.72
4. Step 4: Simplify right side
   1,768.52x = 2,512,216.18
5. Step 5: Solve for x
   x = 2,512,216.18/1,768.52
6. Step 6: Final answer
   x = 1,420.52