Finding the Fourth Proportional to 139,060.09, 206,801.06 and 134,631.37

Step by Step Solution

1. Step 1: Write the proportion equation
   139,060.09 : 206,801.06 = 134,631.37 : x
2. Step 2: Convert to fraction form
   139,060.09/206,801.06 = 134,631.37/x
3. Step 3: Cross multiply
   139,060.09x = 206,801.06 × 134,631.37
4. Step 4: Simplify right side
   139,060.09x = 27,841,910,025.25
5. Step 5: Solve for x
   x = 27,841,910,025.25/139,060.09
6. Step 6: Final answer
   x = 200,214.96