Finding the Fourth Proportional to 72,689.42, 109,080.32 and 37,629.12

Step by Step Solution

1. Step 1: Write the proportion equation
   72,689.42 : 109,080.32 = 37,629.12 : x
2. Step 2: Convert to fraction form
   72,689.42/109,080.32 = 37,629.12/x
3. Step 3: Cross multiply
   72,689.42x = 109,080.32 × 37,629.12
4. Step 4: Simplify right side
   72,689.42x = 4,104,596,450.92
5. Step 5: Solve for x
   x = 4,104,596,450.92/72,689.42
6. Step 6: Final answer
   x = 56,467.59