Finding the Fourth Proportional to 1,501.32, 2,071.82 and 872.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.32 : 2,071.82 = 872.21 : x
2. Step 2: Convert to fraction form
   1,501.32/2,071.82 = 872.21/x
3. Step 3: Cross multiply
   1,501.32x = 2,071.82 × 872.21
4. Step 4: Simplify right side
   1,501.32x = 1,807,062.12
5. Step 5: Solve for x
   x = 1,807,062.12/1,501.32
6. Step 6: Final answer
   x = 1,203.65