Finding the Fourth Proportional to 142,483.99, 196,633.70 and 78,820.69

Step by Step Solution

1. Step 1: Write the proportion equation
   142,483.99 : 196,633.70 = 78,820.69 : x
2. Step 2: Convert to fraction form
   142,483.99/196,633.70 = 78,820.69/x
3. Step 3: Cross multiply
   142,483.99x = 196,633.70 × 78,820.69
4. Step 4: Simplify right side
   142,483.99x = 15,498,803,911.25
5. Step 5: Solve for x
   x = 15,498,803,911.25/142,483.99
6. Step 6: Final answer
   x = 108,775.76