Finding the Fourth Proportional to 60,858.20, 91,278.06 and 21,406.10

Step by Step Solution

1. Step 1: Write the proportion equation
   60,858.20 : 91,278.06 = 21,406.10 : x
2. Step 2: Convert to fraction form
   60,858.20/91,278.06 = 21,406.10/x
3. Step 3: Cross multiply
   60,858.20x = 91,278.06 × 21,406.10
4. Step 4: Simplify right side
   60,858.20x = 1,953,906,823.78
5. Step 5: Solve for x
   x = 1,953,906,823.78/60,858.20
6. Step 6: Final answer
   x = 32,105.90