Finding the Fourth Proportional to 1,538.33, 2,307.42 and 845.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,538.33 : 2,307.42 = 845.31 : x
2. Step 2: Convert to fraction form
   1,538.33/2,307.42 = 845.31/x
3. Step 3: Cross multiply
   1,538.33x = 2,307.42 × 845.31
4. Step 4: Simplify right side
   1,538.33x = 1,950,485.20
5. Step 5: Solve for x
   x = 1,950,485.20/1,538.33
6. Step 6: Final answer
   x = 1,267.93