Finding the Fourth Proportional to 42,108,903.42, 63,169,380.39 and 12,965,208.31

Step by Step Solution

1. Step 1: Write the proportion equation
   42,108,903.42 : 63,169,380.39 = 12,965,208.31 : x
2. Step 2: Convert to fraction form
   42,108,903.42/63,169,380.39 = 12,965,208.31/x
3. Step 3: Cross multiply
   42,108,903.42x = 63,169,380.39 × 12,965,208.31
4. Step 4: Simplify right side
   42,108,903.42x = 819,004,175,569,979.12
5. Step 5: Solve for x
   x = 819,004,175,569,979.12/42,108,903.42
6. Step 6: Final answer
   x = 19,449,667.62