Finding the Fourth Proportional to 80,573.88, 111,156.18 and 53,690.16

Step by Step Solution

1. Step 1: Write the proportion equation
   80,573.88 : 111,156.18 = 53,690.16 : x
2. Step 2: Convert to fraction form
   80,573.88/111,156.18 = 53,690.16/x
3. Step 3: Cross multiply
   80,573.88x = 111,156.18 × 53,690.16
4. Step 4: Simplify right side
   80,573.88x = 5,967,993,089.19
5. Step 5: Solve for x
   x = 5,967,993,089.19/80,573.88
6. Step 6: Final answer
   x = 74,068.58