Finding the Fourth Proportional to 42,406.99, 58,529.18 and 31,705.56

Step by Step Solution

1. Step 1: Write the proportion equation
   42,406.99 : 58,529.18 = 31,705.56 : x
2. Step 2: Convert to fraction form
   42,406.99/58,529.18 = 31,705.56/x
3. Step 3: Cross multiply
   42,406.99x = 58,529.18 × 31,705.56
4. Step 4: Simplify right side
   42,406.99x = 1,855,700,507.50
5. Step 5: Solve for x
   x = 1,855,700,507.50/42,406.99
6. Step 6: Final answer
   x = 43,759.31