Finding the Fourth Proportional to 45,724.28, 63,087.34 and 31,388.49

Step by Step Solution

1. Step 1: Write the proportion equation
   45,724.28 : 63,087.34 = 31,388.49 : x
2. Step 2: Convert to fraction form
   45,724.28/63,087.34 = 31,388.49/x
3. Step 3: Cross multiply
   45,724.28x = 63,087.34 × 31,388.49
4. Step 4: Simplify right side
   45,724.28x = 1,980,216,340.72
5. Step 5: Solve for x
   x = 1,980,216,340.72/45,724.28
6. Step 6: Final answer
   x = 43,307.76