Finding the Fourth Proportional to 1,681.56, 2,322.78 and 1,402.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,681.56 : 2,322.78 = 1,402.72 : x
2. Step 2: Convert to fraction form
   1,681.56/2,322.78 = 1,402.72/x
3. Step 3: Cross multiply
   1,681.56x = 2,322.78 × 1,402.72
4. Step 4: Simplify right side
   1,681.56x = 3,258,198.89
5. Step 5: Solve for x
   x = 3,258,198.89/1,681.56
6. Step 6: Final answer
   x = 1,937.60