Finding the Fourth Proportional to 140,870.54, 194,403.94 and 77,207.88

Step by Step Solution

1. Step 1: Write the proportion equation
   140,870.54 : 194,403.94 = 77,207.88 : x
2. Step 2: Convert to fraction form
   140,870.54/194,403.94 = 77,207.88/x
3. Step 3: Cross multiply
   140,870.54x = 194,403.94 × 77,207.88
4. Step 4: Simplify right side
   140,870.54x = 15,009,516,071.05
5. Step 5: Solve for x
   x = 15,009,516,071.05/140,870.54
6. Step 6: Final answer
   x = 106,548.30