Finding the Fourth Proportional to 159,499.98, 220,108.89 and 87,878.34

Step by Step Solution

1. Step 1: Write the proportion equation
   159,499.98 : 220,108.89 = 87,878.34 : x
2. Step 2: Convert to fraction form
   159,499.98/220,108.89 = 87,878.34/x
3. Step 3: Cross multiply
   159,499.98x = 220,108.89 × 87,878.34
4. Step 4: Simplify right side
   159,499.98x = 19,342,803,872.44
5. Step 5: Solve for x
   x = 19,342,803,872.44/159,499.98
6. Step 6: Final answer
   x = 121,271.51