Finding the Fourth Proportional to 80,880.53, 111,555.72 and 53,607.29

Step by Step Solution

1. Step 1: Write the proportion equation
   80,880.53 : 111,555.72 = 53,607.29 : x
2. Step 2: Convert to fraction form
   80,880.53/111,555.72 = 53,607.29/x
3. Step 3: Cross multiply
   80,880.53x = 111,555.72 × 53,607.29
4. Step 4: Simplify right side
   80,880.53x = 5,980,199,275.42
5. Step 5: Solve for x
   x = 5,980,199,275.42/80,880.53
6. Step 6: Final answer
   x = 73,938.68