Finding the Fourth Proportional to 139,743.30, 192,839.40 and 76,080.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,743.30 : 192,839.40 = 76,080.96 : x
2. Step 2: Convert to fraction form
   139,743.30/192,839.40 = 76,080.96/x
3. Step 3: Cross multiply
   139,743.30x = 192,839.40 × 76,080.96
4. Step 4: Simplify right side
   139,743.30x = 14,671,406,677.82
5. Step 5: Solve for x
   x = 14,671,406,677.82/139,743.30
6. Step 6: Final answer
   x = 104,988.27