Finding the Fourth Proportional to 1,501.51, 2,072.10 and 872.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.51 : 2,072.10 = 872.09 : x
2. Step 2: Convert to fraction form
   1,501.51/2,072.10 = 872.09/x
3. Step 3: Cross multiply
   1,501.51x = 2,072.10 × 872.09
4. Step 4: Simplify right side
   1,501.51x = 1,807,057.69
5. Step 5: Solve for x
   x = 1,807,057.69/1,501.51
6. Step 6: Final answer
   x = 1,203.49