Finding the Fourth Proportional to 142,328.32, 196,395.52 and 78,666.24

Step by Step Solution

1. Step 1: Write the proportion equation
   142,328.32 : 196,395.52 = 78,666.24 : x
2. Step 2: Convert to fraction form
   142,328.32/196,395.52 = 78,666.24/x
3. Step 3: Cross multiply
   142,328.32x = 196,395.52 × 78,666.24
4. Step 4: Simplify right side
   142,328.32x = 15,449,697,111.24
5. Step 5: Solve for x
   x = 15,449,697,111.24/142,328.32
6. Step 6: Final answer
   x = 108,549.70