Finding the Fourth Proportional to 139,099.10, 191,902.41 and 90,757.89

Step by Step Solution

1. Step 1: Write the proportion equation
   139,099.10 : 191,902.41 = 90,757.89 : x
2. Step 2: Convert to fraction form
   139,099.10/191,902.41 = 90,757.89/x
3. Step 3: Cross multiply
   139,099.10x = 191,902.41 × 90,757.89
4. Step 4: Simplify right side
   139,099.10x = 17,416,657,817.51
5. Step 5: Solve for x
   x = 17,416,657,817.51/139,099.10
6. Step 6: Final answer
   x = 125,210.43