Finding the Fourth Proportional to 43,061.16, 64,616.79 and 18,099.30

Step by Step Solution

1. Step 1: Write the proportion equation
   43,061.16 : 64,616.79 = 18,099.30 : x
2. Step 2: Convert to fraction form
   43,061.16/64,616.79 = 18,099.30/x
3. Step 3: Cross multiply
   43,061.16x = 64,616.79 × 18,099.30
4. Step 4: Simplify right side
   43,061.16x = 1,169,518,667.25
5. Step 5: Solve for x
   x = 1,169,518,667.25/43,061.16
6. Step 6: Final answer
   x = 27,159.48