Finding the Fourth Proportional to 3,670.50, 5,065.24 and 1,991.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,670.50 : 5,065.24 = 1,991.91 : x
2. Step 2: Convert to fraction form
   3,670.50/5,065.24 = 1,991.91/x
3. Step 3: Cross multiply
   3,670.50x = 5,065.24 × 1,991.91
4. Step 4: Simplify right side
   3,670.50x = 10,089,502.21
5. Step 5: Solve for x
   x = 10,089,502.21/3,670.50
6. Step 6: Final answer
   x = 2,748.81