Finding the Fourth Proportional to 139,049.87, 191,874.62 and 85,337.15

Step by Step Solution

1. Step 1: Write the proportion equation
   139,049.87 : 191,874.62 = 85,337.15 : x
2. Step 2: Convert to fraction form
   139,049.87/191,874.62 = 85,337.15/x
3. Step 3: Cross multiply
   139,049.87x = 191,874.62 × 85,337.15
4. Step 4: Simplify right side
   139,049.87x = 16,374,032,482.10
5. Step 5: Solve for x
   x = 16,374,032,482.10/139,049.87
6. Step 6: Final answer
   x = 117,756.55