Finding the Fourth Proportional to 60,851.76, 91,287.72 and 19,308.72

Step by Step Solution

1. Step 1: Write the proportion equation
   60,851.76 : 91,287.72 = 19,308.72 : x
2. Step 2: Convert to fraction form
   60,851.76/91,287.72 = 19,308.72/x
3. Step 3: Cross multiply
   60,851.76x = 91,287.72 × 19,308.72
4. Step 4: Simplify right side
   60,851.76x = 1,762,649,024.92
5. Step 5: Solve for x
   x = 1,762,649,024.92/60,851.76
6. Step 6: Final answer
   x = 28,966.28