Finding the Fourth Proportional to 122,978.39, 184,488.62 and 56,424.22

Step by Step Solution

1. Step 1: Write the proportion equation
   122,978.39 : 184,488.62 = 56,424.22 : x
2. Step 2: Convert to fraction form
   122,978.39/184,488.62 = 56,424.22/x
3. Step 3: Cross multiply
   122,978.39x = 184,488.62 × 56,424.22
4. Step 4: Simplify right side
   122,978.39x = 10,409,625,739.03
5. Step 5: Solve for x
   x = 10,409,625,739.03/122,978.39
6. Step 6: Final answer
   x = 84,645.98