Finding the Fourth Proportional to 139,069.54, 191,927.84 and 78,650.92

Step by Step Solution

1. Step 1: Write the proportion equation
   139,069.54 : 191,927.84 = 78,650.92 : x
2. Step 2: Convert to fraction form
   139,069.54/191,927.84 = 78,650.92/x
3. Step 3: Cross multiply
   139,069.54x = 191,927.84 × 78,650.92
4. Step 4: Simplify right side
   139,069.54x = 15,095,301,189.61
5. Step 5: Solve for x
   x = 15,095,301,189.61/139,069.54
6. Step 6: Final answer
   x = 108,544.99