Finding the Fourth Proportional to 166,036.16, 248,733.18 and 139,061.90

Step by Step Solution

1. Step 1: Write the proportion equation
   166,036.16 : 248,733.18 = 139,061.90 : x
2. Step 2: Convert to fraction form
   166,036.16/248,733.18 = 139,061.90/x
3. Step 3: Cross multiply
   166,036.16x = 248,733.18 × 139,061.90
4. Step 4: Simplify right side
   166,036.16x = 34,589,308,603.84
5. Step 5: Solve for x
   x = 34,589,308,603.84/166,036.16
6. Step 6: Final answer
   x = 208,323.95