Finding the Fourth Proportional to 139,054.88, 191,881.52 and 85,342.16

Step by Step Solution

1. Step 1: Write the proportion equation
   139,054.88 : 191,881.52 = 85,342.16 : x
2. Step 2: Convert to fraction form
   139,054.88/191,881.52 = 85,342.16/x
3. Step 3: Cross multiply
   139,054.88x = 191,881.52 × 85,342.16
4. Step 4: Simplify right side
   139,054.88x = 16,375,583,380.88
5. Step 5: Solve for x
   x = 16,375,583,380.88/139,054.88
6. Step 6: Final answer
   x = 117,763.46