Finding the Fourth Proportional to 258,288.89, 387,422.60 and 89,847.36

Step by Step Solution

1. Step 1: Write the proportion equation
   258,288.89 : 387,422.60 = 89,847.36 : x
2. Step 2: Convert to fraction form
   258,288.89/387,422.60 = 89,847.36/x
3. Step 3: Cross multiply
   258,288.89x = 387,422.60 × 89,847.36
4. Step 4: Simplify right side
   258,288.89x = 34,808,897,365.10
5. Step 5: Solve for x
   x = 34,808,897,365.10/258,288.89
6. Step 6: Final answer
   x = 134,767.31