Finding the Fourth Proportional to 42,491.08, 58,654.02 and 28,338.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,491.08 : 58,654.02 = 28,338.76 : x
2. Step 2: Convert to fraction form
   42,491.08/58,654.02 = 28,338.76/x
3. Step 3: Cross multiply
   42,491.08x = 58,654.02 × 28,338.76
4. Step 4: Simplify right side
   42,491.08x = 1,662,182,195.82
5. Step 5: Solve for x
   x = 1,662,182,195.82/42,491.08
6. Step 6: Final answer
   x = 39,118.38