Finding the Fourth Proportional to 43,111.62, 64,665.63 and 11,946.06

Step by Step Solution

1. Step 1: Write the proportion equation
   43,111.62 : 64,665.63 = 11,946.06 : x
2. Step 2: Convert to fraction form
   43,111.62/64,665.63 = 11,946.06/x
3. Step 3: Cross multiply
   43,111.62x = 64,665.63 × 11,946.06
4. Step 4: Simplify right side
   43,111.62x = 772,499,495.92
5. Step 5: Solve for x
   x = 772,499,495.92/43,111.62
6. Step 6: Final answer
   x = 17,918.59