Finding the Fourth Proportional to 1,402.16, 2,103.18 and 477.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.16 : 2,103.18 = 477.72 : x
2. Step 2: Convert to fraction form
   1,402.16/2,103.18 = 477.72/x
3. Step 3: Cross multiply
   1,402.16x = 2,103.18 × 477.72
4. Step 4: Simplify right side
   1,402.16x = 1,004,731.15
5. Step 5: Solve for x
   x = 1,004,731.15/1,402.16
6. Step 6: Final answer
   x = 716.56