Finding the Fourth Proportional to 105,093.30, 157,409.55 and 91,269.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,093.30 : 157,409.55 = 91,269.30 : x
2. Step 2: Convert to fraction form
   105,093.30/157,409.55 = 91,269.30/x
3. Step 3: Cross multiply
   105,093.30x = 157,409.55 × 91,269.30
4. Step 4: Simplify right side
   105,093.30x = 14,366,659,441.82
5. Step 5: Solve for x
   x = 14,366,659,441.82/105,093.30
6. Step 6: Final answer
   x = 136,703.86