Finding the Fourth Proportional to 72,909.81, 109,364.69 and 17,505.81

Step by Step Solution

1. Step 1: Write the proportion equation
   72,909.81 : 109,364.69 = 17,505.81 : x
2. Step 2: Convert to fraction form
   72,909.81/109,364.69 = 17,505.81/x
3. Step 3: Cross multiply
   72,909.81x = 109,364.69 × 17,505.81
4. Step 4: Simplify right side
   72,909.81x = 1,914,517,396.32
5. Step 5: Solve for x
   x = 1,914,517,396.32/72,909.81
6. Step 6: Final answer
   x = 26,258.71