Finding the Fourth Proportional to 139,942.64, 193,120.83 and 76,280.87

Step by Step Solution

1. Step 1: Write the proportion equation
   139,942.64 : 193,120.83 = 76,280.87 : x
2. Step 2: Convert to fraction form
   139,942.64/193,120.83 = 76,280.87/x
3. Step 3: Cross multiply
   139,942.64x = 193,120.83 × 76,280.87
4. Step 4: Simplify right side
   139,942.64x = 14,731,424,927.52
5. Step 5: Solve for x
   x = 14,731,424,927.52/139,942.64
6. Step 6: Final answer
   x = 105,267.59