Finding the Fourth Proportional to 142,093.40, 196,088.52 and 78,430.76

Step by Step Solution

1. Step 1: Write the proportion equation
   142,093.40 : 196,088.52 = 78,430.76 : x
2. Step 2: Convert to fraction form
   142,093.40/196,088.52 = 78,430.76/x
3. Step 3: Cross multiply
   142,093.40x = 196,088.52 × 78,430.76
4. Step 4: Simplify right side
   142,093.40x = 15,379,371,650.88
5. Step 5: Solve for x
   x = 15,379,371,650.88/142,093.40
6. Step 6: Final answer
   x = 108,234.24