Finding the Fourth Proportional to 1,131.84, 1,561.86 and 634.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,131.84 : 1,561.86 = 634.42 : x
2. Step 2: Convert to fraction form
   1,131.84/1,561.86 = 634.42/x
3. Step 3: Cross multiply
   1,131.84x = 1,561.86 × 634.42
4. Step 4: Simplify right side
   1,131.84x = 990,875.22
5. Step 5: Solve for x
   x = 990,875.22/1,131.84
6. Step 6: Final answer
   x = 875.46