Finding the Fourth Proportional to 19,215.25, 28,820.91 and 5,174.71

Step by Step Solution

1. Step 1: Write the proportion equation
   19,215.25 : 28,820.91 = 5,174.71 : x
2. Step 2: Convert to fraction form
   19,215.25/28,820.91 = 5,174.71/x
3. Step 3: Cross multiply
   19,215.25x = 28,820.91 × 5,174.71
4. Step 4: Simplify right side
   19,215.25x = 149,139,851.19
5. Step 5: Solve for x
   x = 149,139,851.19/19,215.25
6. Step 6: Final answer
   x = 7,761.54