Finding the Fourth Proportional to 2,477.60, 3,417.72 and 1,692.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,477.60 : 3,417.72 = 1,692.80 : x
2. Step 2: Convert to fraction form
   2,477.60/3,417.72 = 1,692.80/x
3. Step 3: Cross multiply
   2,477.60x = 3,417.72 × 1,692.80
4. Step 4: Simplify right side
   2,477.60x = 5,785,516.42
5. Step 5: Solve for x
   x = 5,785,516.42/2,477.60
6. Step 6: Final answer
   x = 2,335.13