Finding the Fourth Proportional to 139,760.64, 192,870.72 and 76,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   139,760.64 : 192,870.72 = 76,099.50 : x
2. Step 2: Convert to fraction form
   139,760.64/192,870.72 = 76,099.50/x
3. Step 3: Cross multiply
   139,760.64x = 192,870.72 × 76,099.50
4. Step 4: Simplify right side
   139,760.64x = 14,677,365,356.64
5. Step 5: Solve for x
   x = 14,677,365,356.64/139,760.64
6. Step 6: Final answer
   x = 105,017.87