Finding the Fourth Proportional to 131,030.10, 196,091.55 and 78,477.30

Step by Step Solution

1. Step 1: Write the proportion equation
   131,030.10 : 196,091.55 = 78,477.30 : x
2. Step 2: Convert to fraction form
   131,030.10/196,091.55 = 78,477.30/x
3. Step 3: Cross multiply
   131,030.10x = 196,091.55 × 78,477.30
4. Step 4: Simplify right side
   131,030.10x = 15,388,735,396.82
5. Step 5: Solve for x
   x = 15,388,735,396.82/131,030.10
6. Step 6: Final answer
   x = 117,444.28