Finding the Fourth Proportional to 28,164.56, 42,249.12 and 7,388

Step by Step Solution

1. Step 1: Write the proportion equation
   28,164.56 : 42,249.12 = 7,388 : x
2. Step 2: Convert to fraction form
   28,164.56/42,249.12 = 7,388/x
3. Step 3: Cross multiply
   28,164.56x = 42,249.12 × 7,388
4. Step 4: Simplify right side
   28,164.56x = 312,136,498.56
5. Step 5: Solve for x
   x = 312,136,498.56/28,164.56
6. Step 6: Final answer
   x = 11,082.60