Finding the Fourth Proportional to 42,243.78, 58,319.55 and 28,835.04

Step by Step Solution

1. Step 1: Write the proportion equation
   42,243.78 : 58,319.55 = 28,835.04 : x
2. Step 2: Convert to fraction form
   42,243.78/58,319.55 = 28,835.04/x
3. Step 3: Cross multiply
   42,243.78x = 58,319.55 × 28,835.04
4. Step 4: Simplify right side
   42,243.78x = 1,681,646,557.03
5. Step 5: Solve for x
   x = 1,681,646,557.03/42,243.78
6. Step 6: Final answer
   x = 39,808.15