Finding the Fourth Proportional to 15,071.31, 22,608.76 and 3,978.09

Step by Step Solution

1. Step 1: Write the proportion equation
   15,071.31 : 22,608.76 = 3,978.09 : x
2. Step 2: Convert to fraction form
   15,071.31/22,608.76 = 3,978.09/x
3. Step 3: Cross multiply
   15,071.31x = 22,608.76 × 3,978.09
4. Step 4: Simplify right side
   15,071.31x = 89,939,682.07
5. Step 5: Solve for x
   x = 89,939,682.07/15,071.31
6. Step 6: Final answer
   x = 5,967.61