Finding the Fourth Proportional to 1,056.42, 1,591.79 and 877.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,056.42 : 1,591.79 = 877.82 : x
2. Step 2: Convert to fraction form
   1,056.42/1,591.79 = 877.82/x
3. Step 3: Cross multiply
   1,056.42x = 1,591.79 × 877.82
4. Step 4: Simplify right side
   1,056.42x = 1,397,292.75
5. Step 5: Solve for x
   x = 1,397,292.75/1,056.42
6. Step 6: Final answer
   x = 1,322.67