Finding the Fourth Proportional to 140,661.71, 194,113.69 and 77,005.43

Step by Step Solution

1. Step 1: Write the proportion equation
   140,661.71 : 194,113.69 = 77,005.43 : x
2. Step 2: Convert to fraction form
   140,661.71/194,113.69 = 77,005.43/x
3. Step 3: Cross multiply
   140,661.71x = 194,113.69 × 77,005.43
4. Step 4: Simplify right side
   140,661.71x = 14,947,807,732.18
5. Step 5: Solve for x
   x = 14,947,807,732.18/140,661.71
6. Step 6: Final answer
   x = 106,267.78