Finding the Fourth Proportional to 142,345.98, 196,437.50 and 78,683.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,345.98 : 196,437.50 = 78,683.76 : x
2. Step 2: Convert to fraction form
   142,345.98/196,437.50 = 78,683.76/x
3. Step 3: Cross multiply
   142,345.98x = 196,437.50 × 78,683.76
4. Step 4: Simplify right side
   142,345.98x = 15,456,441,105.00
5. Step 5: Solve for x
   x = 15,456,441,105.00/142,345.98
6. Step 6: Final answer
   x = 108,583.62