Finding the Fourth Proportional to 143,020.83, 197,374.02 and 78,492.03

Step by Step Solution

1. Step 1: Write the proportion equation
   143,020.83 : 197,374.02 = 78,492.03 : x
2. Step 2: Convert to fraction form
   143,020.83/197,374.02 = 78,492.03/x
3. Step 3: Cross multiply
   143,020.83x = 197,374.02 × 78,492.03
4. Step 4: Simplify right side
   143,020.83x = 15,492,287,499.06
5. Step 5: Solve for x
   x = 15,492,287,499.06/143,020.83
6. Step 6: Final answer
   x = 108,321.90