Finding the Fourth Proportional to 35,978.72, 53,970.71 and 12,276.77

Step by Step Solution

1. Step 1: Write the proportion equation
   35,978.72 : 53,970.71 = 12,276.77 : x
2. Step 2: Convert to fraction form
   35,978.72/53,970.71 = 12,276.77/x
3. Step 3: Cross multiply
   35,978.72x = 53,970.71 × 12,276.77
4. Step 4: Simplify right side
   35,978.72x = 662,585,662.17
5. Step 5: Solve for x
   x = 662,585,662.17/35,978.72
6. Step 6: Final answer
   x = 18,416.05