Finding the Fourth Proportional to 143,069.09, 197,455.89 and 85,710.87

Step by Step Solution

1. Step 1: Write the proportion equation
   143,069.09 : 197,455.89 = 85,710.87 : x
2. Step 2: Convert to fraction form
   143,069.09/197,455.89 = 85,710.87/x
3. Step 3: Cross multiply
   143,069.09x = 197,455.89 × 85,710.87
4. Step 4: Simplify right side
   143,069.09x = 16,924,116,118.52
5. Step 5: Solve for x
   x = 16,924,116,118.52/143,069.09
6. Step 6: Final answer
   x = 118,293.31