Finding the Fourth Proportional to 22,394.76, 30,907.61 and 12,961.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,394.76 : 30,907.61 = 12,961.50 : x
2. Step 2: Convert to fraction form
   22,394.76/30,907.61 = 12,961.50/x
3. Step 3: Cross multiply
   22,394.76x = 30,907.61 × 12,961.50
4. Step 4: Simplify right side
   22,394.76x = 400,608,987.02
5. Step 5: Solve for x
   x = 400,608,987.02/22,394.76
6. Step 6: Final answer
   x = 17,888.51