Finding the Fourth Proportional to 1,308.54, 1,961.73 and 538.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,308.54 : 1,961.73 = 538.50 : x
2. Step 2: Convert to fraction form
   1,308.54/1,961.73 = 538.50/x
3. Step 3: Cross multiply
   1,308.54x = 1,961.73 × 538.50
4. Step 4: Simplify right side
   1,308.54x = 1,056,391.61
5. Step 5: Solve for x
   x = 1,056,391.61/1,308.54
6. Step 6: Final answer
   x = 807.31