Finding the Fourth Proportional to 123,149.95, 184,431.70 and 78,638.83

Step by Step Solution

1. Step 1: Write the proportion equation
   123,149.95 : 184,431.70 = 78,638.83 : x
2. Step 2: Convert to fraction form
   123,149.95/184,431.70 = 78,638.83/x
3. Step 3: Cross multiply
   123,149.95x = 184,431.70 × 78,638.83
4. Step 4: Simplify right side
   123,149.95x = 14,503,492,740.13
5. Step 5: Solve for x
   x = 14,503,492,740.13/123,149.95
6. Step 6: Final answer
   x = 117,771.00