Finding the Fourth Proportional to 1,501.82, 2,072.30 and 872.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.82 : 2,072.30 = 872.40 : x
2. Step 2: Convert to fraction form
   1,501.82/2,072.30 = 872.40/x
3. Step 3: Cross multiply
   1,501.82x = 2,072.30 × 872.40
4. Step 4: Simplify right side
   1,501.82x = 1,807,877.93
5. Step 5: Solve for x
   x = 1,807,877.93/1,501.82
6. Step 6: Final answer
   x = 1,203.79