Finding the Fourth Proportional to 139,141.89, 191,942.28 and 98,871.93

Step by Step Solution

1. Step 1: Write the proportion equation
   139,141.89 : 191,942.28 = 98,871.93 : x
2. Step 2: Convert to fraction form
   139,141.89/191,942.28 = 98,871.93/x
3. Step 3: Cross multiply
   139,141.89x = 191,942.28 × 98,871.93
4. Step 4: Simplify right side
   139,141.89x = 18,977,703,672.20
5. Step 5: Solve for x
   x = 18,977,703,672.20/139,141.89
6. Step 6: Final answer
   x = 136,391.02