Finding the Fourth Proportional to 88,786.84, 133,245.78 and 42,039.64

Step by Step Solution

1. Step 1: Write the proportion equation
   88,786.84 : 133,245.78 = 42,039.64 : x
2. Step 2: Convert to fraction form
   88,786.84/133,245.78 = 42,039.64/x
3. Step 3: Cross multiply
   88,786.84x = 133,245.78 × 42,039.64
4. Step 4: Simplify right side
   88,786.84x = 5,601,604,622.72
5. Step 5: Solve for x
   x = 5,601,604,622.72/88,786.84
6. Step 6: Final answer
   x = 63,090.48