Finding the Fourth Proportional to 123,147.04, 184,418.16 and 78,642.40

Step by Step Solution

1. Step 1: Write the proportion equation
   123,147.04 : 184,418.16 = 78,642.40 : x
2. Step 2: Convert to fraction form
   123,147.04/184,418.16 = 78,642.40/x
3. Step 3: Cross multiply
   123,147.04x = 184,418.16 × 78,642.40
4. Step 4: Simplify right side
   123,147.04x = 14,503,086,705.98
5. Step 5: Solve for x
   x = 14,503,086,705.98/123,147.04
6. Step 6: Final answer
   x = 117,770.49