Finding the Fourth Proportional to 139,687.98, 192,810.10 and 91,296.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,687.98 : 192,810.10 = 91,296.96 : x
2. Step 2: Convert to fraction form
   139,687.98/192,810.10 = 91,296.96/x
3. Step 3: Cross multiply
   139,687.98x = 192,810.10 × 91,296.96
4. Step 4: Simplify right side
   139,687.98x = 17,602,975,987.30
5. Step 5: Solve for x
   x = 17,602,975,987.30/139,687.98
6. Step 6: Final answer
   x = 126,016.40