Finding the Fourth Proportional to 3,670.16, 5,064.80 and 1,991.61

Step by Step Solution

1. Step 1: Write the proportion equation
   3,670.16 : 5,064.80 = 1,991.61 : x
2. Step 2: Convert to fraction form
   3,670.16/5,064.80 = 1,991.61/x
3. Step 3: Cross multiply
   3,670.16x = 5,064.80 × 1,991.61
4. Step 4: Simplify right side
   3,670.16x = 10,087,096.37
5. Step 5: Solve for x
   x = 10,087,096.37/3,670.16
6. Step 6: Final answer
   x = 2,748.41