Finding the Fourth Proportional to 42,734,318.99, 64,100,904.39 and 10,386,128.61

Step by Step Solution

1. Step 1: Write the proportion equation
   42,734,318.99 : 64,100,904.39 = 10,386,128.61 : x
2. Step 2: Convert to fraction form
   42,734,318.99/64,100,904.39 = 10,386,128.61/x
3. Step 3: Cross multiply
   42,734,318.99x = 64,100,904.39 × 10,386,128.61
4. Step 4: Simplify right side
   42,734,318.99x = 665,760,237,011,853.62
5. Step 5: Solve for x
   x = 665,760,237,011,853.62/42,734,318.99
6. Step 6: Final answer
   x = 15,579,053.39