Finding the Fourth Proportional to 42,234.78, 58,307.13 and 28,826.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,234.78 : 58,307.13 = 28,826.04 : x
2. Step 2: Convert to fraction form
   42,234.78/58,307.13 = 28,826.04/x
3. Step 3: Cross multiply
   42,234.78x = 58,307.13 × 28,826.04
4. Step 4: Simplify right side
   42,234.78x = 1,680,763,661.67
5. Step 5: Solve for x
   x = 1,680,763,661.67/42,234.78
6. Step 6: Final answer
   x = 39,795.72