Finding the Fourth Proportional to 70,637.32, 105,857.46 and 53,086.60

Step by Step Solution

1. Step 1: Write the proportion equation
   70,637.32 : 105,857.46 = 53,086.60 : x
2. Step 2: Convert to fraction form
   70,637.32/105,857.46 = 53,086.60/x
3. Step 3: Cross multiply
   70,637.32x = 105,857.46 × 53,086.60
4. Step 4: Simplify right side
   70,637.32x = 5,619,612,636.04
5. Step 5: Solve for x
   x = 5,619,612,636.04/70,637.32
6. Step 6: Final answer
   x = 79,555.86