Finding the Fourth Proportional to 70,559.76, 105,840.72 and 17,970.24

Step by Step Solution

1. Step 1: Write the proportion equation
   70,559.76 : 105,840.72 = 17,970.24 : x
2. Step 2: Convert to fraction form
   70,559.76/105,840.72 = 17,970.24/x
3. Step 3: Cross multiply
   70,559.76x = 105,840.72 × 17,970.24
4. Step 4: Simplify right side
   70,559.76x = 1,901,983,140.17
5. Step 5: Solve for x
   x = 1,901,983,140.17/70,559.76
6. Step 6: Final answer
   x = 26,955.64