Finding the Fourth Proportional to 159,017.78, 219,443.88 and 87,400.82

Step by Step Solution

1. Step 1: Write the proportion equation
   159,017.78 : 219,443.88 = 87,400.82 : x
2. Step 2: Convert to fraction form
   159,017.78/219,443.88 = 87,400.82/x
3. Step 3: Cross multiply
   159,017.78x = 219,443.88 × 87,400.82
4. Step 4: Simplify right side
   159,017.78x = 19,179,575,932.34
5. Step 5: Solve for x
   x = 19,179,575,932.34/159,017.78
6. Step 6: Final answer
   x = 120,612.77