Finding the Fourth Proportional to 3,623.82, 5,434.85 and 991.34

Step by Step Solution

1. Step 1: Write the proportion equation
   3,623.82 : 5,434.85 = 991.34 : x
2. Step 2: Convert to fraction form
   3,623.82/5,434.85 = 991.34/x
3. Step 3: Cross multiply
   3,623.82x = 5,434.85 × 991.34
4. Step 4: Simplify right side
   3,623.82x = 5,387,752.07
5. Step 5: Solve for x
   x = 5,387,752.07/3,623.82
6. Step 6: Final answer
   x = 1,486.76