Finding the Fourth Proportional to 222,430.72, 333,678.88 and 64,638.72

Step by Step Solution

1. Step 1: Write the proportion equation
   222,430.72 : 333,678.88 = 64,638.72 : x
2. Step 2: Convert to fraction form
   222,430.72/333,678.88 = 64,638.72/x
3. Step 3: Cross multiply
   222,430.72x = 333,678.88 × 64,638.72
4. Step 4: Simplify right side
   222,430.72x = 21,568,575,694.23
5. Step 5: Solve for x
   x = 21,568,575,694.23/222,430.72
6. Step 6: Final answer
   x = 96,967.61