Finding the Fourth Proportional to 42,111.11, 58,066.13 and 28,690.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42,111.11 : 58,066.13 = 28,690.22 : x
2. Step 2: Convert to fraction form
   42,111.11/58,066.13 = 28,690.22/x
3. Step 3: Cross multiply
   42,111.11x = 58,066.13 × 28,690.22
4. Step 4: Simplify right side
   42,111.11x = 1,665,930,261.14
5. Step 5: Solve for x
   x = 1,665,930,261.14/42,111.11
6. Step 6: Final answer
   x = 39,560.35