Finding the Fourth Proportional to 70,636.32, 105,855.96 and 53,085.60

Step by Step Solution

1. Step 1: Write the proportion equation
   70,636.32 : 105,855.96 = 53,085.60 : x
2. Step 2: Convert to fraction form
   70,636.32/105,855.96 = 53,085.60/x
3. Step 3: Cross multiply
   70,636.32x = 105,855.96 × 53,085.60
4. Step 4: Simplify right side
   70,636.32x = 5,619,427,150.18
5. Step 5: Solve for x
   x = 5,619,427,150.18/70,636.32
6. Step 6: Final answer
   x = 79,554.36