Finding the Fourth Proportional to 123,072.80, 184,555.20 and 56,490.80

Step by Step Solution

1. Step 1: Write the proportion equation
   123,072.80 : 184,555.20 = 56,490.80 : x
2. Step 2: Convert to fraction form
   123,072.80/184,555.20 = 56,490.80/x
3. Step 3: Cross multiply
   123,072.80x = 184,555.20 × 56,490.80
4. Step 4: Simplify right side
   123,072.80x = 10,425,670,892.16
5. Step 5: Solve for x
   x = 10,425,670,892.16/123,072.80
6. Step 6: Final answer
   x = 84,711.41