Finding the Fourth Proportional to 105,106.30, 157,429.05 and 91,282.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,106.30 : 157,429.05 = 91,282.30 : x
2. Step 2: Convert to fraction form
   105,106.30/157,429.05 = 91,282.30/x
3. Step 3: Cross multiply
   105,106.30x = 157,429.05 × 91,282.30
4. Step 4: Simplify right side
   105,106.30x = 14,370,485,770.82
5. Step 5: Solve for x
   x = 14,370,485,770.82/105,106.30
6. Step 6: Final answer
   x = 136,723.35