Finding the Fourth Proportional to 142,434.72, 196,561.08 and 78,773.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,434.72 : 196,561.08 = 78,773.76 : x
2. Step 2: Convert to fraction form
   142,434.72/196,561.08 = 78,773.76/x
3. Step 3: Cross multiply
   142,434.72x = 196,561.08 × 78,773.76
4. Step 4: Simplify right side
   142,434.72x = 15,483,855,341.26
5. Step 5: Solve for x
   x = 15,483,855,341.26/142,434.72
6. Step 6: Final answer
   x = 108,708.43