Finding the Fourth Proportional to 1,536.72, 2,302.83 and 911.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,536.72 : 2,302.83 = 911.40 : x
2. Step 2: Convert to fraction form
   1,536.72/2,302.83 = 911.40/x
3. Step 3: Cross multiply
   1,536.72x = 2,302.83 × 911.40
4. Step 4: Simplify right side
   1,536.72x = 2,098,799.26
5. Step 5: Solve for x
   x = 2,098,799.26/1,536.72
6. Step 6: Final answer
   x = 1,365.77