Finding the Fourth Proportional to 22,391.51, 30,700.02 and 21,991.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,391.51 : 30,700.02 = 21,991.69 : x
2. Step 2: Convert to fraction form
   22,391.51/30,700.02 = 21,991.69/x
3. Step 3: Cross multiply
   22,391.51x = 30,700.02 × 21,991.69
4. Step 4: Simplify right side
   22,391.51x = 675,145,322.83
5. Step 5: Solve for x
   x = 675,145,322.83/22,391.51
6. Step 6: Final answer
   x = 30,151.84