Finding the Fourth Proportional to 81,978.87, 113,132.16 and 45,680.37

Step by Step Solution

1. Step 1: Write the proportion equation
   81,978.87 : 113,132.16 = 45,680.37 : x
2. Step 2: Convert to fraction form
   81,978.87/113,132.16 = 45,680.37/x
3. Step 3: Cross multiply
   81,978.87x = 113,132.16 × 45,680.37
4. Step 4: Simplify right side
   81,978.87x = 5,167,918,927.70
5. Step 5: Solve for x
   x = 5,167,918,927.70/81,978.87
6. Step 6: Final answer
   x = 63,039.65