Finding the Fourth Proportional to 42,353.15, 58,421.93 and 28,013.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,353.15 : 58,421.93 = 28,013.31 : x
2. Step 2: Convert to fraction form
   42,353.15/58,421.93 = 28,013.31/x
3. Step 3: Cross multiply
   42,353.15x = 58,421.93 × 28,013.31
4. Step 4: Simplify right side
   42,353.15x = 1,636,591,495.82
5. Step 5: Solve for x
   x = 1,636,591,495.82/42,353.15
6. Step 6: Final answer
   x = 38,641.56