Finding the Fourth Proportional to 55,145.94, 76,118.70 and 31,288.46

Step by Step Solution

1. Step 1: Write the proportion equation
   55,145.94 : 76,118.70 = 31,288.46 : x
2. Step 2: Convert to fraction form
   55,145.94/76,118.70 = 31,288.46/x
3. Step 3: Cross multiply
   55,145.94x = 76,118.70 × 31,288.46
4. Step 4: Simplify right side
   55,145.94x = 2,381,636,900.20
5. Step 5: Solve for x
   x = 2,381,636,900.20/55,145.94
6. Step 6: Final answer
   x = 43,187.89