Finding the Fourth Proportional to 123,146.04, 184,416.66 and 78,641.40

Step by Step Solution

1. Step 1: Write the proportion equation
   123,146.04 : 184,416.66 = 78,641.40 : x
2. Step 2: Convert to fraction form
   123,146.04/184,416.66 = 78,641.40/x
3. Step 3: Cross multiply
   123,146.04x = 184,416.66 × 78,641.40
4. Step 4: Simplify right side
   123,146.04x = 14,502,784,325.72
5. Step 5: Solve for x
   x = 14,502,784,325.72/123,146.04
6. Step 6: Final answer
   x = 117,768.99