Finding the Fourth Proportional to 76,784.32, 105,982.16 and 49,993.76

Step by Step Solution

1. Step 1: Write the proportion equation
   76,784.32 : 105,982.16 = 49,993.76 : x
2. Step 2: Convert to fraction form
   76,784.32/105,982.16 = 49,993.76/x
3. Step 3: Cross multiply
   76,784.32x = 105,982.16 × 49,993.76
4. Step 4: Simplify right side
   76,784.32x = 5,298,446,671.32
5. Step 5: Solve for x
   x = 5,298,446,671.32/76,784.32
6. Step 6: Final answer
   x = 69,004.28