Finding the Fourth Proportional to 43,300.56, 64,954.98 and 12,135.72

Step by Step Solution

1. Step 1: Write the proportion equation
   43,300.56 : 64,954.98 = 12,135.72 : x
2. Step 2: Convert to fraction form
   43,300.56/64,954.98 = 12,135.72/x
3. Step 3: Cross multiply
   43,300.56x = 64,954.98 × 12,135.72
4. Step 4: Simplify right side
   43,300.56x = 788,275,449.89
5. Step 5: Solve for x
   x = 788,275,449.89/43,300.56
6. Step 6: Final answer
   x = 18,204.74