Finding the Fourth Proportional to 139,920.72, 193,094.64 and 76,262.64

Step by Step Solution

1. Step 1: Write the proportion equation
   139,920.72 : 193,094.64 = 76,262.64 : x
2. Step 2: Convert to fraction form
   139,920.72/193,094.64 = 76,262.64/x
3. Step 3: Cross multiply
   139,920.72x = 193,094.64 × 76,262.64
4. Step 4: Simplify right side
   139,920.72x = 14,725,907,016.25
5. Step 5: Solve for x
   x = 14,725,907,016.25/139,920.72
6. Step 6: Final answer
   x = 105,244.65