Finding the Fourth Proportional to 1,175.84, 1,623.34 and 878.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,175.84 : 1,623.34 = 878.72 : x
2. Step 2: Convert to fraction form
   1,175.84/1,623.34 = 878.72/x
3. Step 3: Cross multiply
   1,175.84x = 1,623.34 × 878.72
4. Step 4: Simplify right side
   1,175.84x = 1,426,461.32
5. Step 5: Solve for x
   x = 1,426,461.32/1,175.84
6. Step 6: Final answer
   x = 1,213.14