Finding the Fourth Proportional to 70,969.28, 106,451.52 and 17,661.15

Step by Step Solution

1. Step 1: Write the proportion equation
   70,969.28 : 106,451.52 = 17,661.15 : x
2. Step 2: Convert to fraction form
   70,969.28/106,451.52 = 17,661.15/x
3. Step 3: Cross multiply
   70,969.28x = 106,451.52 × 17,661.15
4. Step 4: Simplify right side
   70,969.28x = 1,880,056,196.22
5. Step 5: Solve for x
   x = 1,880,056,196.22/70,969.28
6. Step 6: Final answer
   x = 26,491.13