Finding the Fourth Proportional to 70,458.56, 105,691.55 and 17,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   70,458.56 : 105,691.55 = 17,868.50 : x
2. Step 2: Convert to fraction form
   70,458.56/105,691.55 = 17,868.50/x
3. Step 3: Cross multiply
   70,458.56x = 105,691.55 × 17,868.50
4. Step 4: Simplify right side
   70,458.56x = 1,888,548,843.37
5. Step 5: Solve for x
   x = 1,888,548,843.37/70,458.56
6. Step 6: Final answer
   x = 26,803.68