Finding the Fourth Proportional to 120,410,942.16, 166,166,971.08 and 65,406,839.76

Step by Step Solution

1. Step 1: Write the proportion equation
   120,410,942.16 : 166,166,971.08 = 65,406,839.76 : x
2. Step 2: Convert to fraction form
   120,410,942.16/166,166,971.08 = 65,406,839.76/x
3. Step 3: Cross multiply
   120,410,942.16x = 166,166,971.08 × 65,406,839.76
4. Step 4: Simplify right side
   120,410,942.16x = 10,868,456,450,834,114
5. Step 5: Solve for x
   x = 10,868,456,450,834,114/120,410,942.16
6. Step 6: Final answer
   x = 90,261,368.74