Finding the Fourth Proportional to 1,501.76, 2,072.16 and 872.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,501.76 : 2,072.16 = 872.36 : x
2. Step 2: Convert to fraction form
   1,501.76/2,072.16 = 872.36/x
3. Step 3: Cross multiply
   1,501.76x = 2,072.16 × 872.36
4. Step 4: Simplify right side
   1,501.76x = 1,807,669.50
5. Step 5: Solve for x
   x = 1,807,669.50/1,501.76
6. Step 6: Final answer
   x = 1,203.70