Finding the Fourth Proportional to 70,131.31, 96,717.10 and 54,819.88

Step by Step Solution

1. Step 1: Write the proportion equation
   70,131.31 : 96,717.10 = 54,819.88 : x
2. Step 2: Convert to fraction form
   70,131.31/96,717.10 = 54,819.88/x
3. Step 3: Cross multiply
   70,131.31x = 96,717.10 × 54,819.88
4. Step 4: Simplify right side
   70,131.31x = 5,302,019,815.95
5. Step 5: Solve for x
   x = 5,302,019,815.95/70,131.31
6. Step 6: Final answer
   x = 75,601.32