Finding the Fourth Proportional to 49,612.86, 68,438.46 and 31,430.28

Step by Step Solution

1. Step 1: Write the proportion equation
   49,612.86 : 68,438.46 = 31,430.28 : x
2. Step 2: Convert to fraction form
   49,612.86/68,438.46 = 31,430.28/x
3. Step 3: Cross multiply
   49,612.86x = 68,438.46 × 31,430.28
4. Step 4: Simplify right side
   49,612.86x = 2,151,039,960.57
5. Step 5: Solve for x
   x = 2,151,039,960.57/49,612.86
6. Step 6: Final answer
   x = 43,356.50