Finding the Fourth Proportional to 139,714.29, 209,536.43 and 59,712.72

Step by Step Solution

1. Step 1: Write the proportion equation
   139,714.29 : 209,536.43 = 59,712.72 : x
2. Step 2: Convert to fraction form
   139,714.29/209,536.43 = 59,712.72/x
3. Step 3: Cross multiply
   139,714.29x = 209,536.43 × 59,712.72
4. Step 4: Simplify right side
   139,714.29x = 12,511,990,174.39
5. Step 5: Solve for x
   x = 12,511,990,174.39/139,714.29
6. Step 6: Final answer
   x = 89,554.12