Finding the Fourth Proportional to 22,301.59, 30,777.56 and 12,870.76

Step by Step Solution

1. Step 1: Write the proportion equation
   22,301.59 : 30,777.56 = 12,870.76 : x
2. Step 2: Convert to fraction form
   22,301.59/30,777.56 = 12,870.76/x
3. Step 3: Cross multiply
   22,301.59x = 30,777.56 × 12,870.76
4. Step 4: Simplify right side
   22,301.59x = 396,130,588.15
5. Step 5: Solve for x
   x = 396,130,588.15/22,301.59
6. Step 6: Final answer
   x = 17,762.44