Finding the Fourth Proportional to 139,820.99, 192,870.42 and 98,939.07

Step by Step Solution

1. Step 1: Write the proportion equation
   139,820.99 : 192,870.42 = 98,939.07 : x
2. Step 2: Convert to fraction form
   139,820.99/192,870.42 = 98,939.07/x
3. Step 3: Cross multiply
   139,820.99x = 192,870.42 × 98,939.07
4. Step 4: Simplify right side
   139,820.99x = 19,082,419,614.29
5. Step 5: Solve for x
   x = 19,082,419,614.29/139,820.99
6. Step 6: Final answer
   x = 136,477.51