Finding the Fourth Proportional to 1,042.29, 1,445.82 and 986.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,042.29 : 1,445.82 = 986.94 : x
2. Step 2: Convert to fraction form
   1,042.29/1,445.82 = 986.94/x
3. Step 3: Cross multiply
   1,042.29x = 1,445.82 × 986.94
4. Step 4: Simplify right side
   1,042.29x = 1,426,937.59
5. Step 5: Solve for x
   x = 1,426,937.59/1,042.29
6. Step 6: Final answer
   x = 1,369.04