Finding the Fourth Proportional to 142,605.60, 196,798.06 and 78,073.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,605.60 : 196,798.06 = 78,073.76 : x
2. Step 2: Convert to fraction form
   142,605.60/196,798.06 = 78,073.76/x
3. Step 3: Cross multiply
   142,605.60x = 196,798.06 × 78,073.76
4. Step 4: Simplify right side
   142,605.60x = 15,364,763,548.34
5. Step 5: Solve for x
   x = 15,364,763,548.34/142,605.60
6. Step 6: Final answer
   x = 107,743.06