Finding the Fourth Proportional to 60,680.48, 91,021.17 and 18,561.31

Step by Step Solution

1. Step 1: Write the proportion equation
   60,680.48 : 91,021.17 = 18,561.31 : x
2. Step 2: Convert to fraction form
   60,680.48/91,021.17 = 18,561.31/x
3. Step 3: Cross multiply
   60,680.48x = 91,021.17 × 18,561.31
4. Step 4: Simplify right side
   60,680.48x = 1,689,472,152.93
5. Step 5: Solve for x
   x = 1,689,472,152.93/60,680.48
6. Step 6: Final answer
   x = 27,842.10