Finding the Fourth Proportional to 19,173.72, 28,748.16 and 7,488.12

Step by Step Solution

1. Step 1: Write the proportion equation
   19,173.72 : 28,748.16 = 7,488.12 : x
2. Step 2: Convert to fraction form
   19,173.72/28,748.16 = 7,488.12/x
3. Step 3: Cross multiply
   19,173.72x = 28,748.16 × 7,488.12
4. Step 4: Simplify right side
   19,173.72x = 215,269,671.86
5. Step 5: Solve for x
   x = 215,269,671.86/19,173.72
6. Step 6: Final answer
   x = 11,227.33