Finding the Fourth Proportional to 51,388.58, 70,912.32 and 31,242.67

Step by Step Solution

1. Step 1: Write the proportion equation
   51,388.58 : 70,912.32 = 31,242.67 : x
2. Step 2: Convert to fraction form
   51,388.58/70,912.32 = 31,242.67/x
3. Step 3: Cross multiply
   51,388.58x = 70,912.32 × 31,242.67
4. Step 4: Simplify right side
   51,388.58x = 2,215,490,212.69
5. Step 5: Solve for x
   x = 2,215,490,212.69/51,388.58
6. Step 6: Final answer
   x = 43,112.50