Finding the Fourth Proportional to 120,410,994.16, 166,167,042.84 and 65,406,891.76

Step by Step Solution

1. Step 1: Write the proportion equation
   120,410,994.16 : 166,167,042.84 = 65,406,891.76 : x
2. Step 2: Convert to fraction form
   120,410,994.16/166,167,042.84 = 65,406,891.76/x
3. Step 3: Cross multiply
   120,410,994.16x = 166,167,042.84 × 65,406,891.76
4. Step 4: Simplify right side
   120,410,994.16x = 10,868,469,785,115,162
5. Step 5: Solve for x
   x = 10,868,469,785,115,162/120,410,994.16
6. Step 6: Final answer
   x = 90,261,440.50