Finding the Fourth Proportional to 1,400.89, 1,933.20 and 877.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,400.89 : 1,933.20 = 877.21 : x
2. Step 2: Convert to fraction form
   1,400.89/1,933.20 = 877.21/x
3. Step 3: Cross multiply
   1,400.89x = 1,933.20 × 877.21
4. Step 4: Simplify right side
   1,400.89x = 1,695,822.37
5. Step 5: Solve for x
   x = 1,695,822.37/1,400.89
6. Step 6: Final answer
   x = 1,210.53