Finding the Fourth Proportional to 42,277.82, 58,275.64 and 28,661.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42,277.82 : 58,275.64 = 28,661.69 : x
2. Step 2: Convert to fraction form
   42,277.82/58,275.64 = 28,661.69/x
3. Step 3: Cross multiply
   42,277.82x = 58,275.64 × 28,661.69
4. Step 4: Simplify right side
   42,277.82x = 1,670,278,402.27
5. Step 5: Solve for x
   x = 1,670,278,402.27/42,277.82
6. Step 6: Final answer
   x = 39,507.20