Finding the Fourth Proportional to 81,519, 112,494.78 and 45,708.90

Step by Step Solution

1. Step 1: Write the proportion equation
   81,519 : 112,494.78 = 45,708.90 : x
2. Step 2: Convert to fraction form
   81,519/112,494.78 = 45,708.90/x
3. Step 3: Cross multiply
   81,519x = 112,494.78 × 45,708.90
4. Step 4: Simplify right side
   81,519x = 5,142,012,649.54
5. Step 5: Solve for x
   x = 5,142,012,649.54/81,519
6. Step 6: Final answer
   x = 63,077.47