Finding the Fourth Proportional to 170,714.81, 256,404.18 and 139,148.03

Step by Step Solution

1. Step 1: Write the proportion equation
   170,714.81 : 256,404.18 = 139,148.03 : x
2. Step 2: Convert to fraction form
   170,714.81/256,404.18 = 139,148.03/x
3. Step 3: Cross multiply
   170,714.81x = 256,404.18 × 139,148.03
4. Step 4: Simplify right side
   170,714.81x = 35,678,136,530.77
5. Step 5: Solve for x
   x = 35,678,136,530.77/170,714.81
6. Step 6: Final answer
   x = 208,992.63