Finding the Fourth Proportional to 88,499.21, 122,009.50 and 85,747.37

Step by Step Solution

1. Step 1: Write the proportion equation
   88,499.21 : 122,009.50 = 85,747.37 : x
2. Step 2: Convert to fraction form
   88,499.21/122,009.50 = 85,747.37/x
3. Step 3: Cross multiply
   88,499.21x = 122,009.50 × 85,747.37
4. Step 4: Simplify right side
   88,499.21x = 10,461,993,740.02
5. Step 5: Solve for x
   x = 10,461,993,740.02/88,499.21
6. Step 6: Final answer
   x = 118,215.67