Finding the Fourth Proportional to 3,670.09, 5,064.71 and 1,991.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,670.09 : 5,064.71 = 1,991.50 : x
2. Step 2: Convert to fraction form
   3,670.09/5,064.71 = 1,991.50/x
3. Step 3: Cross multiply
   3,670.09x = 5,064.71 × 1,991.50
4. Step 4: Simplify right side
   3,670.09x = 10,086,347.35
5. Step 5: Solve for x
   x = 10,086,347.35/3,670.09
6. Step 6: Final answer
   x = 2,748.26