Finding the Fourth Proportional to 139,907.16, 193,066.24 and 76,243.59

Step by Step Solution

1. Step 1: Write the proportion equation
   139,907.16 : 193,066.24 = 76,243.59 : x
2. Step 2: Convert to fraction form
   139,907.16/193,066.24 = 76,243.59/x
3. Step 3: Cross multiply
   139,907.16x = 193,066.24 × 76,243.59
4. Step 4: Simplify right side
   139,907.16x = 14,720,063,245.40
5. Step 5: Solve for x
   x = 14,720,063,245.40/139,907.16
6. Step 6: Final answer
   x = 105,213.08