Finding the Fourth Proportional to 259,774.90, 389,590.86 and 88,994.09

Step by Step Solution

1. Step 1: Write the proportion equation
   259,774.90 : 389,590.86 = 88,994.09 : x
2. Step 2: Convert to fraction form
   259,774.90/389,590.86 = 88,994.09/x
3. Step 3: Cross multiply
   259,774.90x = 389,590.86 × 88,994.09
4. Step 4: Simplify right side
   259,774.90x = 34,671,285,365.72
5. Step 5: Solve for x
   x = 34,671,285,365.72/259,774.90
6. Step 6: Final answer
   x = 133,466.65