Finding the Fourth Proportional to 56,389.72, 77,816.97 and 30,895.89

Step by Step Solution

1. Step 1: Write the proportion equation
   56,389.72 : 77,816.97 = 30,895.89 : x
2. Step 2: Convert to fraction form
   56,389.72/77,816.97 = 30,895.89/x
3. Step 3: Cross multiply
   56,389.72x = 77,816.97 × 30,895.89
4. Step 4: Simplify right side
   56,389.72x = 2,404,224,545.25
5. Step 5: Solve for x
   x = 2,404,224,545.25/56,389.72
6. Step 6: Final answer
   x = 42,635.87