Finding the Fourth Proportional to 140,946.48, 194,505.57 and 77,288.31

Step by Step Solution

1. Step 1: Write the proportion equation
   140,946.48 : 194,505.57 = 77,288.31 : x
2. Step 2: Convert to fraction form
   140,946.48/194,505.57 = 77,288.31/x
3. Step 3: Cross multiply
   140,946.48x = 194,505.57 × 77,288.31
4. Step 4: Simplify right side
   140,946.48x = 15,033,006,790.89
5. Step 5: Solve for x
   x = 15,033,006,790.89/140,946.48
6. Step 6: Final answer
   x = 106,657.55