Finding the Fourth Proportional to 73,128.42, 109,736.46 and 31,575.42

Step by Step Solution

1. Step 1: Write the proportion equation
   73,128.42 : 109,736.46 = 31,575.42 : x
2. Step 2: Convert to fraction form
   73,128.42/109,736.46 = 31,575.42/x
3. Step 3: Cross multiply
   73,128.42x = 109,736.46 × 31,575.42
4. Step 4: Simplify right side
   73,128.42x = 3,464,974,813.81
5. Step 5: Solve for x
   x = 3,464,974,813.81/73,128.42
6. Step 6: Final answer
   x = 47,382.05