Finding the Fourth Proportional to 1,572.50, 2,166.59 and 1,172.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,572.50 : 2,166.59 = 1,172.46 : x
2. Step 2: Convert to fraction form
   1,572.50/2,166.59 = 1,172.46/x
3. Step 3: Cross multiply
   1,572.50x = 2,166.59 × 1,172.46
4. Step 4: Simplify right side
   1,572.50x = 2,540,229.28
5. Step 5: Solve for x
   x = 2,540,229.28/1,572.50
6. Step 6: Final answer
   x = 1,615.41