Finding the Fourth Proportional to 123,253.10, 184,551.60 and 78,638.30

Step by Step Solution

1. Step 1: Write the proportion equation
   123,253.10 : 184,551.60 = 78,638.30 : x
2. Step 2: Convert to fraction form
   123,253.10/184,551.60 = 78,638.30/x
3. Step 3: Cross multiply
   123,253.10x = 184,551.60 × 78,638.30
4. Step 4: Simplify right side
   123,253.10x = 14,512,824,086.28
5. Step 5: Solve for x
   x = 14,512,824,086.28/123,253.10
6. Step 6: Final answer
   x = 117,748.15