Finding the Fourth Proportional to 1,402.91, 1,935.89 and 813.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,402.91 : 1,935.89 = 813.48 : x
2. Step 2: Convert to fraction form
   1,402.91/1,935.89 = 813.48/x
3. Step 3: Cross multiply
   1,402.91x = 1,935.89 × 813.48
4. Step 4: Simplify right side
   1,402.91x = 1,574,803.73
5. Step 5: Solve for x
   x = 1,574,803.73/1,402.91
6. Step 6: Final answer
   x = 1,122.53