Finding the Fourth Proportional to 2,991.18, 4,487.00 and 799.86

Step by Step Solution

1. Step 1: Write the proportion equation
   2,991.18 : 4,487.00 = 799.86 : x
2. Step 2: Convert to fraction form
   2,991.18/4,487.00 = 799.86/x
3. Step 3: Cross multiply
   2,991.18x = 4,487.00 × 799.86
4. Step 4: Simplify right side
   2,991.18x = 3,588,967.82
5. Step 5: Solve for x
   x = 3,588,967.82/2,991.18
6. Step 6: Final answer
   x = 1,199.85