Finding the Fourth Proportional to 2,530.71, 3,796.39 and 991.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,530.71 : 3,796.39 = 991.51 : x
2. Step 2: Convert to fraction form
   2,530.71/3,796.39 = 991.51/x
3. Step 3: Cross multiply
   2,530.71x = 3,796.39 × 991.51
4. Step 4: Simplify right side
   2,530.71x = 3,764,153.69
5. Step 5: Solve for x
   x = 3,764,153.69/2,530.71
6. Step 6: Final answer
   x = 1,487.39