Finding the Fourth Proportional to 42,342.57, 58,433.06 and 28,913.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42,342.57 : 58,433.06 = 28,913.48 : x
2. Step 2: Convert to fraction form
   42,342.57/58,433.06 = 28,913.48/x
3. Step 3: Cross multiply
   42,342.57x = 58,433.06 × 28,913.48
4. Step 4: Simplify right side
   42,342.57x = 1,689,503,111.65
5. Step 5: Solve for x
   x = 1,689,503,111.65/42,342.57
6. Step 6: Final answer
   x = 39,900.82