Finding the Fourth Proportional to 139,870.82, 209,656.83 and 55,514.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,870.82 : 209,656.83 = 55,514.18 : x
2. Step 2: Convert to fraction form
   139,870.82/209,656.83 = 55,514.18/x
3. Step 3: Cross multiply
   139,870.82x = 209,656.83 × 55,514.18
4. Step 4: Simplify right side
   139,870.82x = 11,638,926,998.85
5. Step 5: Solve for x
   x = 11,638,926,998.85/139,870.82
6. Step 6: Final answer
   x = 83,211.97