Finding the Fourth Proportional to 142,090.10, 196,085.96 and 78,427.94

Step by Step Solution

1. Step 1: Write the proportion equation
   142,090.10 : 196,085.96 = 78,427.94 : x
2. Step 2: Convert to fraction form
   142,090.10/196,085.96 = 78,427.94/x
3. Step 3: Cross multiply
   142,090.10x = 196,085.96 × 78,427.94
4. Step 4: Simplify right side
   142,090.10x = 15,378,616,533.15
5. Step 5: Solve for x
   x = 15,378,616,533.15/142,090.10
6. Step 6: Final answer
   x = 108,231.45