Finding the Fourth Proportional to 42,009.77, 57,977.57 and 31,380.95

Step by Step Solution

1. Step 1: Write the proportion equation
   42,009.77 : 57,977.57 = 31,380.95 : x
2. Step 2: Convert to fraction form
   42,009.77/57,977.57 = 31,380.95/x
3. Step 3: Cross multiply
   42,009.77x = 57,977.57 × 31,380.95
4. Step 4: Simplify right side
   42,009.77x = 1,819,391,448.69
5. Step 5: Solve for x
   x = 1,819,391,448.69/42,009.77
6. Step 6: Final answer
   x = 43,308.77