Finding the Fourth Proportional to 22,518.56, 31,077.04 and 12,961.68

Step by Step Solution

1. Step 1: Write the proportion equation
   22,518.56 : 31,077.04 = 12,961.68 : x
2. Step 2: Convert to fraction form
   22,518.56/31,077.04 = 12,961.68/x
3. Step 3: Cross multiply
   22,518.56x = 31,077.04 × 12,961.68
4. Step 4: Simplify right side
   22,518.56x = 402,810,647.83
5. Step 5: Solve for x
   x = 402,810,647.83/22,518.56
6. Step 6: Final answer
   x = 17,887.94