Finding the Fourth Proportional to 1,672.31, 2,307.91 and 926.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.31 : 2,307.91 = 926.37 : x
2. Step 2: Convert to fraction form
   1,672.31/2,307.91 = 926.37/x
3. Step 3: Cross multiply
   1,672.31x = 2,307.91 × 926.37
4. Step 4: Simplify right side
   1,672.31x = 2,137,978.59
5. Step 5: Solve for x
   x = 2,137,978.59/1,672.31
6. Step 6: Final answer
   x = 1,278.46