Finding the Fourth Proportional to 81,698.88, 112,752.72 and 49,886.40

Step by Step Solution

1. Step 1: Write the proportion equation
   81,698.88 : 112,752.72 = 49,886.40 : x
2. Step 2: Convert to fraction form
   81,698.88/112,752.72 = 49,886.40/x
3. Step 3: Cross multiply
   81,698.88x = 112,752.72 × 49,886.40
4. Step 4: Simplify right side
   81,698.88x = 5,624,827,291.01
5. Step 5: Solve for x
   x = 5,624,827,291.01/81,698.88
6. Step 6: Final answer
   x = 68,848.28