Finding the Fourth Proportional to 42,920.64, 59,175.72 and 27,786.60

Step by Step Solution

1. Step 1: Write the proportion equation
   42,920.64 : 59,175.72 = 27,786.60 : x
2. Step 2: Convert to fraction form
   42,920.64/59,175.72 = 27,786.60/x
3. Step 3: Cross multiply
   42,920.64x = 59,175.72 × 27,786.60
4. Step 4: Simplify right side
   42,920.64x = 1,644,292,061.35
5. Step 5: Solve for x
   x = 1,644,292,061.35/42,920.64
6. Step 6: Final answer
   x = 38,310.05