Finding the Fourth Proportional to 165,443.68, 248,209.24 and 86,536.72

Step by Step Solution

1. Step 1: Write the proportion equation
   165,443.68 : 248,209.24 = 86,536.72 : x
2. Step 2: Convert to fraction form
   165,443.68/248,209.24 = 86,536.72/x
3. Step 3: Cross multiply
   165,443.68x = 248,209.24 × 86,536.72
4. Step 4: Simplify right side
   165,443.68x = 21,479,213,503.29
5. Step 5: Solve for x
   x = 21,479,213,503.29/165,443.68
6. Step 6: Final answer
   x = 129,827.95