Finding the Fourth Proportional to 1,683.72, 2,513.55 and 1,572.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,683.72 : 2,513.55 = 1,572.55 : x
2. Step 2: Convert to fraction form
   1,683.72/2,513.55 = 1,572.55/x
3. Step 3: Cross multiply
   1,683.72x = 2,513.55 × 1,572.55
4. Step 4: Simplify right side
   1,683.72x = 3,952,692.09
5. Step 5: Solve for x
   x = 3,952,692.09/1,683.72
6. Step 6: Final answer
   x = 2,347.59