Finding the Fourth Proportional to 142,080.30, 196,056.86 and 78,413.99

Step by Step Solution

1. Step 1: Write the proportion equation
   142,080.30 : 196,056.86 = 78,413.99 : x
2. Step 2: Convert to fraction form
   142,080.30/196,056.86 = 78,413.99/x
3. Step 3: Cross multiply
   142,080.30x = 196,056.86 × 78,413.99
4. Step 4: Simplify right side
   142,080.30x = 15,373,599,287.12
5. Step 5: Solve for x
   x = 15,373,599,287.12/142,080.30
6. Step 6: Final answer
   x = 108,203.60