Finding the Fourth Proportional to 143,016.53, 197,368.50 and 78,488.03

Step by Step Solution

1. Step 1: Write the proportion equation
   143,016.53 : 197,368.50 = 78,488.03 : x
2. Step 2: Convert to fraction form
   143,016.53/197,368.50 = 78,488.03/x
3. Step 3: Cross multiply
   143,016.53x = 197,368.50 × 78,488.03
4. Step 4: Simplify right side
   143,016.53x = 15,491,063,762.21
5. Step 5: Solve for x
   x = 15,491,063,762.21/143,016.53
6. Step 6: Final answer
   x = 108,316.60