Finding the Fourth Proportional to 28,026.72, 42,064.56 and 11,395.80

Step by Step Solution

1. Step 1: Write the proportion equation
   28,026.72 : 42,064.56 = 11,395.80 : x
2. Step 2: Convert to fraction form
   28,026.72/42,064.56 = 11,395.80/x
3. Step 3: Cross multiply
   28,026.72x = 42,064.56 × 11,395.80
4. Step 4: Simplify right side
   28,026.72x = 479,359,312.85
5. Step 5: Solve for x
   x = 479,359,312.85/28,026.72
6. Step 6: Final answer
   x = 17,103.65