Finding the Fourth Proportional to 78,611.67, 108,499.47 and 49,964.70

Step by Step Solution

1. Step 1: Write the proportion equation
   78,611.67 : 108,499.47 = 49,964.70 : x
2. Step 2: Convert to fraction form
   78,611.67/108,499.47 = 49,964.70/x
3. Step 3: Cross multiply
   78,611.67x = 108,499.47 × 49,964.70
4. Step 4: Simplify right side
   78,611.67x = 5,421,143,468.71
5. Step 5: Solve for x
   x = 5,421,143,468.71/78,611.67
6. Step 6: Final answer
   x = 68,961.05