Finding the Fourth Proportional to 139,390.02, 208,968.30 and 97,146.18

Step by Step Solution

1. Step 1: Write the proportion equation
   139,390.02 : 208,968.30 = 97,146.18 : x
2. Step 2: Convert to fraction form
   139,390.02/208,968.30 = 97,146.18/x
3. Step 3: Cross multiply
   139,390.02x = 208,968.30 × 97,146.18
4. Step 4: Simplify right side
   139,390.02x = 20,300,472,086.09
5. Step 5: Solve for x
   x = 20,300,472,086.09/139,390.02
6. Step 6: Final answer
   x = 145,637.92