Finding the Fourth Proportional to 153,142.05, 211,336.20 and 85,158.27

Step by Step Solution

1. Step 1: Write the proportion equation
   153,142.05 : 211,336.20 = 85,158.27 : x
2. Step 2: Convert to fraction form
   153,142.05/211,336.20 = 85,158.27/x
3. Step 3: Cross multiply
   153,142.05x = 211,336.20 × 85,158.27
4. Step 4: Simplify right side
   153,142.05x = 17,997,025,180.37
5. Step 5: Solve for x
   x = 17,997,025,180.37/153,142.05
6. Step 6: Final answer
   x = 117,518.51