Finding the Fourth Proportional to 70,526.78, 105,790.56 and 17,936.30

Step by Step Solution

1. Step 1: Write the proportion equation
   70,526.78 : 105,790.56 = 17,936.30 : x
2. Step 2: Convert to fraction form
   70,526.78/105,790.56 = 17,936.30/x
3. Step 3: Cross multiply
   70,526.78x = 105,790.56 × 17,936.30
4. Step 4: Simplify right side
   70,526.78x = 1,897,491,221.33
5. Step 5: Solve for x
   x = 1,897,491,221.33/70,526.78
6. Step 6: Final answer
   x = 26,904.55