Finding the Fourth Proportional to 77,568, 107,043.84 and 42,240

Step by Step Solution

1. Step 1: Write the proportion equation
   77,568 : 107,043.84 = 42,240 : x
2. Step 2: Convert to fraction form
   77,568/107,043.84 = 42,240/x
3. Step 3: Cross multiply
   77,568x = 107,043.84 × 42,240
4. Step 4: Simplify right side
   77,568x = 4,521,531,801.60
5. Step 5: Solve for x
   x = 4,521,531,801.60/77,568
6. Step 6: Final answer
   x = 58,291.20