Finding the Fourth Proportional to 42,023.60, 57,991.71 and 23,160.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,023.60 : 57,991.71 = 23,160.72 : x
2. Step 2: Convert to fraction form
   42,023.60/57,991.71 = 23,160.72/x
3. Step 3: Cross multiply
   42,023.60x = 57,991.71 × 23,160.72
4. Step 4: Simplify right side
   42,023.60x = 1,343,129,757.63
5. Step 5: Solve for x
   x = 1,343,129,757.63/42,023.60
6. Step 6: Final answer
   x = 31,961.32