Finding the Fourth Proportional to 1,501.92, 2,072.50 and 872.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.92 : 2,072.50 = 872.30 : x
2. Step 2: Convert to fraction form
   1,501.92/2,072.50 = 872.30/x
3. Step 3: Cross multiply
   1,501.92x = 2,072.50 × 872.30
4. Step 4: Simplify right side
   1,501.92x = 1,807,844.75
5. Step 5: Solve for x
   x = 1,807,844.75/1,501.92
6. Step 6: Final answer
   x = 1,203.69