Finding the Fourth Proportional to 139,686.98, 192,808.72 and 91,295.96

Step by Step Solution

1. Step 1: Write the proportion equation
   139,686.98 : 192,808.72 = 91,295.96 : x
2. Step 2: Convert to fraction form
   139,686.98/192,808.72 = 91,295.96/x
3. Step 3: Cross multiply
   139,686.98x = 192,808.72 × 91,295.96
4. Step 4: Simplify right side
   139,686.98x = 17,602,657,188.77
5. Step 5: Solve for x
   x = 17,602,657,188.77/139,686.98
6. Step 6: Final answer
   x = 126,015.02