Finding the Fourth Proportional to 13,819.48, 19,070.78 and 7,531.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,819.48 : 19,070.78 = 7,531.72 : x
2. Step 2: Convert to fraction form
   13,819.48/19,070.78 = 7,531.72/x
3. Step 3: Cross multiply
   13,819.48x = 19,070.78 × 7,531.72
4. Step 4: Simplify right side
   13,819.48x = 143,635,775.14
5. Step 5: Solve for x
   x = 143,635,775.14/13,819.48
6. Step 6: Final answer
   x = 10,393.72