Finding the Fourth Proportional to 42,686,631.70, 64,030,099.42 and 10,338,555.94

Step by Step Solution

1. Step 1: Write the proportion equation
   42,686,631.70 : 64,030,099.42 = 10,338,555.94 : x
2. Step 2: Convert to fraction form
   42,686,631.70/64,030,099.42 = 10,338,555.94/x
3. Step 3: Cross multiply
   42,686,631.70x = 64,030,099.42 × 10,338,555.94
4. Step 4: Simplify right side
   42,686,631.70x = 661,978,764,697,431.50
5. Step 5: Solve for x
   x = 661,978,764,697,431.50/42,686,631.70
6. Step 6: Final answer
   x = 15,507,870.69