Finding the Fourth Proportional to 140,871.06, 194,400.96 and 77,208.72

Step by Step Solution

1. Step 1: Write the proportion equation
   140,871.06 : 194,400.96 = 77,208.72 : x
2. Step 2: Convert to fraction form
   140,871.06/194,400.96 = 77,208.72/x
3. Step 3: Cross multiply
   140,871.06x = 194,400.96 × 77,208.72
4. Step 4: Simplify right side
   140,871.06x = 15,009,449,288.37
5. Step 5: Solve for x
   x = 15,009,449,288.37/140,871.06
6. Step 6: Final answer
   x = 106,547.43