Finding the Fourth Proportional to 1,501.71, 2,072.35 and 872.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.71 : 2,072.35 = 872.10 : x
2. Step 2: Convert to fraction form
   1,501.71/2,072.35 = 872.10/x
3. Step 3: Cross multiply
   1,501.71x = 2,072.35 × 872.10
4. Step 4: Simplify right side
   1,501.71x = 1,807,297.53
5. Step 5: Solve for x
   x = 1,807,297.53/1,501.71
6. Step 6: Final answer
   x = 1,203.50