Finding the Fourth Proportional to 13,978.55, 19,290.48 and 8,010.47

Step by Step Solution

1. Step 1: Write the proportion equation
   13,978.55 : 19,290.48 = 8,010.47 : x
2. Step 2: Convert to fraction form
   13,978.55/19,290.48 = 8,010.47/x
3. Step 3: Cross multiply
   13,978.55x = 19,290.48 × 8,010.47
4. Step 4: Simplify right side
   13,978.55x = 154,525,811.33
5. Step 5: Solve for x
   x = 154,525,811.33/13,978.55
6. Step 6: Final answer
   x = 11,054.50