Finding the Fourth Proportional to 139,078, 206,827.86 and 134,649.48

Step by Step Solution

1. Step 1: Write the proportion equation
   139,078 : 206,827.86 = 134,649.48 : x
2. Step 2: Convert to fraction form
   139,078/206,827.86 = 134,649.48/x
3. Step 3: Cross multiply
   139,078x = 206,827.86 × 134,649.48
4. Step 4: Simplify right side
   139,078x = 27,849,263,798.51
5. Step 5: Solve for x
   x = 27,849,263,798.51/139,078
6. Step 6: Final answer
   x = 200,242.05