Finding the Fourth Proportional to 76,354.28, 105,430.82 and 47,707.31

Step by Step Solution

1. Step 1: Write the proportion equation
   76,354.28 : 105,430.82 = 47,707.31 : x
2. Step 2: Convert to fraction form
   76,354.28/105,430.82 = 47,707.31/x
3. Step 3: Cross multiply
   76,354.28x = 105,430.82 × 47,707.31
4. Step 4: Simplify right side
   76,354.28x = 5,029,820,838.33
5. Step 5: Solve for x
   x = 5,029,820,838.33/76,354.28
6. Step 6: Final answer
   x = 65,874.77