Finding the Fourth Proportional to 162,536.09, 243,852.43 and 78,271.89

Step by Step Solution

1. Step 1: Write the proportion equation
   162,536.09 : 243,852.43 = 78,271.89 : x
2. Step 2: Convert to fraction form
   162,536.09/243,852.43 = 78,271.89/x
3. Step 3: Cross multiply
   162,536.09x = 243,852.43 × 78,271.89
4. Step 4: Simplify right side
   162,536.09x = 19,086,790,577.19
5. Step 5: Solve for x
   x = 19,086,790,577.19/162,536.09
6. Step 6: Final answer
   x = 117,431.09