Finding the Fourth Proportional to 1,672.56, 2,308.06 and 926.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.56 : 2,308.06 = 926.50 : x
2. Step 2: Convert to fraction form
   1,672.56/2,308.06 = 926.50/x
3. Step 3: Cross multiply
   1,672.56x = 2,308.06 × 926.50
4. Step 4: Simplify right side
   1,672.56x = 2,138,417.59
5. Step 5: Solve for x
   x = 2,138,417.59/1,672.56
6. Step 6: Final answer
   x = 1,278.53