Finding the Fourth Proportional to 22,435.84, 30,961.38 and 13,009.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,435.84 : 30,961.38 = 13,009.78 : x
2. Step 2: Convert to fraction form
   22,435.84/30,961.38 = 13,009.78/x
3. Step 3: Cross multiply
   22,435.84x = 30,961.38 × 13,009.78
4. Step 4: Simplify right side
   22,435.84x = 402,800,742.30
5. Step 5: Solve for x
   x = 402,800,742.30/22,435.84
6. Step 6: Final answer
   x = 17,953.45