Finding the Fourth Proportional to 81,864, 112,977.59 and 49,620.87

Step by Step Solution

1. Step 1: Write the proportion equation
   81,864 : 112,977.59 = 49,620.87 : x
2. Step 2: Convert to fraction form
   81,864/112,977.59 = 49,620.87/x
3. Step 3: Cross multiply
   81,864x = 112,977.59 × 49,620.87
4. Step 4: Simplify right side
   81,864x = 5,606,046,058.20
5. Step 5: Solve for x
   x = 5,606,046,058.20/81,864
6. Step 6: Final answer
   x = 68,479.99