Finding the Fourth Proportional to 153,018.72, 211,164.72 and 85,951.20

Step by Step Solution

1. Step 1: Write the proportion equation
   153,018.72 : 211,164.72 = 85,951.20 : x
2. Step 2: Convert to fraction form
   153,018.72/211,164.72 = 85,951.20/x
3. Step 3: Cross multiply
   153,018.72x = 211,164.72 × 85,951.20
4. Step 4: Simplify right side
   153,018.72x = 18,149,861,081.66
5. Step 5: Solve for x
   x = 18,149,861,081.66/153,018.72
6. Step 6: Final answer
   x = 118,612.03