Finding the Fourth Proportional to 19,002.58, 28,502.78 and 5,150.50

Step by Step Solution

1. Step 1: Write the proportion equation
   19,002.58 : 28,502.78 = 5,150.50 : x
2. Step 2: Convert to fraction form
   19,002.58/28,502.78 = 5,150.50/x
3. Step 3: Cross multiply
   19,002.58x = 28,502.78 × 5,150.50
4. Step 4: Simplify right side
   19,002.58x = 146,803,568.39
5. Step 5: Solve for x
   x = 146,803,568.39/19,002.58
6. Step 6: Final answer
   x = 7,725.45