Finding the Fourth Proportional to 2,705.20, 4,052.16 and 1,402.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,705.20 : 4,052.16 = 1,402.72 : x
2. Step 2: Convert to fraction form
   2,705.20/4,052.16 = 1,402.72/x
3. Step 3: Cross multiply
   2,705.20x = 4,052.16 × 1,402.72
4. Step 4: Simplify right side
   2,705.20x = 5,684,045.88
5. Step 5: Solve for x
   x = 5,684,045.88/2,705.20
6. Step 6: Final answer
   x = 2,101.16