Finding the Fourth Proportional to 115,621.42, 173,411.64 and 31,388.12

Step by Step Solution

1. Step 1: Write the proportion equation
   115,621.42 : 173,411.64 = 31,388.12 : x
2. Step 2: Convert to fraction form
   115,621.42/173,411.64 = 31,388.12/x
3. Step 3: Cross multiply
   115,621.42x = 173,411.64 × 31,388.12
4. Step 4: Simplify right side
   115,621.42x = 5,443,065,365.72
5. Step 5: Solve for x
   x = 5,443,065,365.72/115,621.42
6. Step 6: Final answer
   x = 47,076.62