Finding the Fourth Proportional to 123,002.80, 184,450.20 and 56,420.80

Step by Step Solution

1. Step 1: Write the proportion equation
   123,002.80 : 184,450.20 = 56,420.80 : x
2. Step 2: Convert to fraction form
   123,002.80/184,450.20 = 56,420.80/x
3. Step 3: Cross multiply
   123,002.80x = 184,450.20 × 56,420.80
4. Step 4: Simplify right side
   123,002.80x = 10,406,827,844.16
5. Step 5: Solve for x
   x = 10,406,827,844.16/123,002.80
6. Step 6: Final answer
   x = 84,606.43