Finding the Fourth Proportional to 143,064.90, 197,367.93 and 86,443.50

Step by Step Solution

1. Step 1: Write the proportion equation
   143,064.90 : 197,367.93 = 86,443.50 : x
2. Step 2: Convert to fraction form
   143,064.90/197,367.93 = 86,443.50/x
3. Step 3: Cross multiply
   143,064.90x = 197,367.93 × 86,443.50
4. Step 4: Simplify right side
   143,064.90x = 17,061,174,656.96
5. Step 5: Solve for x
   x = 17,061,174,656.96/143,064.90
6. Step 6: Final answer
   x = 119,254.79