Finding the Fourth Proportional to 42,267.45, 58,327.77 and 28,145.91

Step by Step Solution

1. Step 1: Write the proportion equation
   42,267.45 : 58,327.77 = 28,145.91 : x
2. Step 2: Convert to fraction form
   42,267.45/58,327.77 = 28,145.91/x
3. Step 3: Cross multiply
   42,267.45x = 58,327.77 × 28,145.91
4. Step 4: Simplify right side
   42,267.45x = 1,641,688,164.92
5. Step 5: Solve for x
   x = 1,641,688,164.92/42,267.45
6. Step 6: Final answer
   x = 38,840.48