Finding the Fourth Proportional to 123,151.95, 184,434.70 and 78,640.83

Step by Step Solution

1. Step 1: Write the proportion equation
   123,151.95 : 184,434.70 = 78,640.83 : x
2. Step 2: Convert to fraction form
   123,151.95/184,434.70 = 78,640.83/x
3. Step 3: Cross multiply
   123,151.95x = 184,434.70 × 78,640.83
4. Step 4: Simplify right side
   123,151.95x = 14,504,097,888.80
5. Step 5: Solve for x
   x = 14,504,097,888.80/123,151.95
6. Step 6: Final answer
   x = 117,774.00