Finding the Fourth Proportional to 139,143.90, 191,945.04 and 98,873.94

Step by Step Solution

1. Step 1: Write the proportion equation
   139,143.90 : 191,945.04 = 98,873.94 : x
2. Step 2: Convert to fraction form
   139,143.90/191,945.04 = 98,873.94/x
3. Step 3: Cross multiply
   139,143.90x = 191,945.04 × 98,873.94
4. Step 4: Simplify right side
   139,143.90x = 18,978,362,368.26
5. Step 5: Solve for x
   x = 18,978,362,368.26/139,143.90
6. Step 6: Final answer
   x = 136,393.78