Finding the Fourth Proportional to 81,490.40, 112,464.72 and 45,680.48

Step by Step Solution

1. Step 1: Write the proportion equation
   81,490.40 : 112,464.72 = 45,680.48 : x
2. Step 2: Convert to fraction form
   81,490.40/112,464.72 = 45,680.48/x
3. Step 3: Cross multiply
   81,490.40x = 112,464.72 × 45,680.48
4. Step 4: Simplify right side
   81,490.40x = 5,137,442,392.67
5. Step 5: Solve for x
   x = 5,137,442,392.67/81,490.40
6. Step 6: Final answer
   x = 63,043.53