Finding the Fourth Proportional to 31,404.68, 46,902.61 and 28,138.76

Step by Step Solution

1. Step 1: Write the proportion equation
   31,404.68 : 46,902.61 = 28,138.76 : x
2. Step 2: Convert to fraction form
   31,404.68/46,902.61 = 28,138.76/x
3. Step 3: Cross multiply
   31,404.68x = 46,902.61 × 28,138.76
4. Step 4: Simplify right side
   31,404.68x = 1,319,781,286.16
5. Step 5: Solve for x
   x = 1,319,781,286.16/31,404.68
6. Step 6: Final answer
   x = 42,024.99