Finding the Fourth Proportional to 42,128.89, 58,138.32 and 23,009.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42,128.89 : 58,138.32 = 23,009.22 : x
2. Step 2: Convert to fraction form
   42,128.89/58,138.32 = 23,009.22/x
3. Step 3: Cross multiply
   42,128.89x = 58,138.32 × 23,009.22
4. Step 4: Simplify right side
   42,128.89x = 1,337,717,481.59
5. Step 5: Solve for x
   x = 1,337,717,481.59/42,128.89
6. Step 6: Final answer
   x = 31,752.97