Finding the Fourth Proportional to 128,405,651.94, 192,568,017.59 and 42,123,952.98

Step by Step Solution

1. Step 1: Write the proportion equation
   128,405,651.94 : 192,568,017.59 = 42,123,952.98 : x
2. Step 2: Convert to fraction form
   128,405,651.94/192,568,017.59 = 42,123,952.98/x
3. Step 3: Cross multiply
   128,405,651.94x = 192,568,017.59 × 42,123,952.98
4. Step 4: Simplify right side
   128,405,651.94x = 8,111,726,118,412,972
5. Step 5: Solve for x
   x = 8,111,726,118,412,972/128,405,651.94
6. Step 6: Final answer
   x = 63,172,656.31