Finding the Fourth Proportional to 42,778.12, 64,022.62 and 30,545.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42,778.12 : 64,022.62 = 30,545.48 : x
2. Step 2: Convert to fraction form
   42,778.12/64,022.62 = 30,545.48/x
3. Step 3: Cross multiply
   42,778.12x = 64,022.62 × 30,545.48
4. Step 4: Simplify right side
   42,778.12x = 1,955,601,658.76
5. Step 5: Solve for x
   x = 1,955,601,658.76/42,778.12
6. Step 6: Final answer
   x = 45,715.00