Finding the Fourth Proportional to 76,149.50, 105,071.73 and 49,288.28

Step by Step Solution

1. Step 1: Write the proportion equation
   76,149.50 : 105,071.73 = 49,288.28 : x
2. Step 2: Convert to fraction form
   76,149.50/105,071.73 = 49,288.28/x
3. Step 3: Cross multiply
   76,149.50x = 105,071.73 × 49,288.28
4. Step 4: Simplify right side
   76,149.50x = 5,178,804,848.32
5. Step 5: Solve for x
   x = 5,178,804,848.32/76,149.50
6. Step 6: Final answer
   x = 68,008.39