Finding the Fourth Proportional to 60,806.40, 91,218.72 and 21,356.56

Step by Step Solution

1. Step 1: Write the proportion equation
   60,806.40 : 91,218.72 = 21,356.56 : x
2. Step 2: Convert to fraction form
   60,806.40/91,218.72 = 21,356.56/x
3. Step 3: Cross multiply
   60,806.40x = 91,218.72 × 21,356.56
4. Step 4: Simplify right side
   60,806.40x = 1,948,118,066.80
5. Step 5: Solve for x
   x = 1,948,118,066.80/60,806.40
6. Step 6: Final answer
   x = 32,038.04