Finding the Fourth Proportional to 45,421.98, 62,628.71 and 31,088.72

Step by Step Solution

1. Step 1: Write the proportion equation
   45,421.98 : 62,628.71 = 31,088.72 : x
2. Step 2: Convert to fraction form
   45,421.98/62,628.71 = 31,088.72/x
3. Step 3: Cross multiply
   45,421.98x = 62,628.71 × 31,088.72
4. Step 4: Simplify right side
   45,421.98x = 1,947,045,960.56
5. Step 5: Solve for x
   x = 1,947,045,960.56/45,421.98
6. Step 6: Final answer
   x = 42,865.72