Finding the Fourth Proportional to 22,978.08, 34,415.76 and 19,978.08

Step by Step Solution

1. Step 1: Write the proportion equation
   22,978.08 : 34,415.76 = 19,978.08 : x
2. Step 2: Convert to fraction form
   22,978.08/34,415.76 = 19,978.08/x
3. Step 3: Cross multiply
   22,978.08x = 34,415.76 × 19,978.08
4. Step 4: Simplify right side
   22,978.08x = 687,560,806.54
5. Step 5: Solve for x
   x = 687,560,806.54/22,978.08
6. Step 6: Final answer
   x = 29,922.47