Finding the Fourth Proportional to 42,588.16, 58,739.52 and 40,076.80

Step by Step Solution

1. Step 1: Write the proportion equation
   42,588.16 : 58,739.52 = 40,076.80 : x
2. Step 2: Convert to fraction form
   42,588.16/58,739.52 = 40,076.80/x
3. Step 3: Cross multiply
   42,588.16x = 58,739.52 × 40,076.80
4. Step 4: Simplify right side
   42,588.16x = 2,354,091,995.14
5. Step 5: Solve for x
   x = 2,354,091,995.14/42,588.16
6. Step 6: Final answer
   x = 55,275.74