Finding the Fourth Proportional to 99,188.37, 136,845.72 and 63,399.33

Step by Step Solution

1. Step 1: Write the proportion equation
   99,188.37 : 136,845.72 = 63,399.33 : x
2. Step 2: Convert to fraction form
   99,188.37/136,845.72 = 63,399.33/x
3. Step 3: Cross multiply
   99,188.37x = 136,845.72 × 63,399.33
4. Step 4: Simplify right side
   99,188.37x = 8,675,926,961.37
5. Step 5: Solve for x
   x = 8,675,926,961.37/99,188.37
6. Step 6: Final answer
   x = 87,469.20