Finding the Fourth Proportional to 76,561.68, 105,675.92 and 49,702.72

Step by Step Solution

1. Step 1: Write the proportion equation
   76,561.68 : 105,675.92 = 49,702.72 : x
2. Step 2: Convert to fraction form
   76,561.68/105,675.92 = 49,702.72/x
3. Step 3: Cross multiply
   76,561.68x = 105,675.92 × 49,702.72
4. Step 4: Simplify right side
   76,561.68x = 5,252,380,662.50
5. Step 5: Solve for x
   x = 5,252,380,662.50/76,561.68
6. Step 6: Final answer
   x = 68,603.26