Finding the Fourth Proportional to 1,672.36, 2,307.86 and 926.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,672.36 : 2,307.86 = 926.32 : x
2. Step 2: Convert to fraction form
   1,672.36/2,307.86 = 926.32/x
3. Step 3: Cross multiply
   1,672.36x = 2,307.86 × 926.32
4. Step 4: Simplify right side
   1,672.36x = 2,137,814.56
5. Step 5: Solve for x
   x = 2,137,814.56/1,672.36
6. Step 6: Final answer
   x = 1,278.32