Finding the Fourth Proportional to 1,042.96, 1,436.80 and 847.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.96 : 1,436.80 = 847.76 : x
2. Step 2: Convert to fraction form
   1,042.96/1,436.80 = 847.76/x
3. Step 3: Cross multiply
   1,042.96x = 1,436.80 × 847.76
4. Step 4: Simplify right side
   1,042.96x = 1,218,061.57
5. Step 5: Solve for x
   x = 1,218,061.57/1,042.96
6. Step 6: Final answer
   x = 1,167.89