Finding the Fourth Proportional to 139,917.96, 193,084.56 and 76,256.28

Step by Step Solution

1. Step 1: Write the proportion equation
   139,917.96 : 193,084.56 = 76,256.28 : x
2. Step 2: Convert to fraction form
   139,917.96/193,084.56 = 76,256.28/x
3. Step 3: Cross multiply
   139,917.96x = 193,084.56 × 76,256.28
4. Step 4: Simplify right side
   139,917.96x = 14,723,910,271.04
5. Step 5: Solve for x
   x = 14,723,910,271.04/139,917.96
6. Step 6: Final answer
   x = 105,232.45