Finding the Fourth Proportional to 152,968.50, 211,096.53 and 85,900.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,968.50 : 211,096.53 = 85,900.50 : x
2. Step 2: Convert to fraction form
   152,968.50/211,096.53 = 85,900.50/x
3. Step 3: Cross multiply
   152,968.50x = 211,096.53 × 85,900.50
4. Step 4: Simplify right side
   152,968.50x = 18,133,297,475.27
5. Step 5: Solve for x
   x = 18,133,297,475.27/152,968.50
6. Step 6: Final answer
   x = 118,542.69