Finding the Fourth Proportional to 19,123.75, 28,679.15 and 7,274.71

Step by Step Solution

1. Step 1: Write the proportion equation
   19,123.75 : 28,679.15 = 7,274.71 : x
2. Step 2: Convert to fraction form
   19,123.75/28,679.15 = 7,274.71/x
3. Step 3: Cross multiply
   19,123.75x = 28,679.15 × 7,274.71
4. Step 4: Simplify right side
   19,123.75x = 208,632,445.79
5. Step 5: Solve for x
   x = 208,632,445.79/19,123.75
6. Step 6: Final answer
   x = 10,909.60