Finding the Fourth Proportional to 139,956.66, 193,171.50 and 88,959.47

Step by Step Solution

1. Step 1: Write the proportion equation
   139,956.66 : 193,171.50 = 88,959.47 : x
2. Step 2: Convert to fraction form
   139,956.66/193,171.50 = 88,959.47/x
3. Step 3: Cross multiply
   139,956.66x = 193,171.50 × 88,959.47
4. Step 4: Simplify right side
   139,956.66x = 17,184,433,293.25
5. Step 5: Solve for x
   x = 17,184,433,293.25/139,956.66
6. Step 6: Final answer
   x = 122,783.96