Finding the Fourth Proportional to 43,300.98, 64,944.15 and 12,129.06

Step by Step Solution

1. Step 1: Write the proportion equation
   43,300.98 : 64,944.15 = 12,129.06 : x
2. Step 2: Convert to fraction form
   43,300.98/64,944.15 = 12,129.06/x
3. Step 3: Cross multiply
   43,300.98x = 64,944.15 × 12,129.06
4. Step 4: Simplify right side
   43,300.98x = 787,711,492.00
5. Step 5: Solve for x
   x = 787,711,492.00/43,300.98
6. Step 6: Final answer
   x = 18,191.54