Finding the Fourth Proportional to 2,521.81, 3,480.03 and 1,402.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.81 : 3,480.03 = 1,402.72 : x
2. Step 2: Convert to fraction form
   2,521.81/3,480.03 = 1,402.72/x
3. Step 3: Cross multiply
   2,521.81x = 3,480.03 × 1,402.72
4. Step 4: Simplify right side
   2,521.81x = 4,881,507.68
5. Step 5: Solve for x
   x = 4,881,507.68/2,521.81
6. Step 6: Final answer
   x = 1,935.72