Finding the Fourth Proportional to 142,040.63, 196,010.34 and 78,377.60

Step by Step Solution

1. Step 1: Write the proportion equation
   142,040.63 : 196,010.34 = 78,377.60 : x
2. Step 2: Convert to fraction form
   142,040.63/196,010.34 = 78,377.60/x
3. Step 3: Cross multiply
   142,040.63x = 196,010.34 × 78,377.60
4. Step 4: Simplify right side
   142,040.63x = 15,362,820,024.38
5. Step 5: Solve for x
   x = 15,362,820,024.38/142,040.63
6. Step 6: Final answer
   x = 108,157.93