Finding the Fourth Proportional to 56,543,144.69, 78,032,872.73 and 42,579,864.56

Step by Step Solution

1. Step 1: Write the proportion equation
   56,543,144.69 : 78,032,872.73 = 42,579,864.56 : x
2. Step 2: Convert to fraction form
   56,543,144.69/78,032,872.73 = 42,579,864.56/x
3. Step 3: Cross multiply
   56,543,144.69x = 78,032,872.73 × 42,579,864.56
4. Step 4: Simplify right side
   56,543,144.69x = 3,322,629,151,468,053.50
5. Step 5: Solve for x
   x = 3,322,629,151,468,053.50/56,543,144.69
6. Step 6: Final answer
   x = 58,762,723.05