Finding the Fourth Proportional to 45,724.29, 63,087.35 and 31,388.50

Step by Step Solution

1. Step 1: Write the proportion equation
   45,724.29 : 63,087.35 = 31,388.50 : x
2. Step 2: Convert to fraction form
   45,724.29/63,087.35 = 31,388.50/x
3. Step 3: Cross multiply
   45,724.29x = 63,087.35 × 31,388.50
4. Step 4: Simplify right side
   45,724.29x = 1,980,217,128.53
5. Step 5: Solve for x
   x = 1,980,217,128.53/45,724.29
6. Step 6: Final answer
   x = 43,307.78