Finding the Fourth Proportional to 78,031.78, 107,644.18 and 47,396.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,031.78 : 107,644.18 = 47,396.72 : x
2. Step 2: Convert to fraction form
   78,031.78/107,644.18 = 47,396.72/x
3. Step 3: Cross multiply
   78,031.78x = 107,644.18 × 47,396.72
4. Step 4: Simplify right side
   78,031.78x = 5,101,981,059.09
5. Step 5: Solve for x
   x = 5,101,981,059.09/78,031.78
6. Step 6: Final answer
   x = 65,383.38