Finding the Fourth Proportional to 105,095.30, 157,412.55 and 91,271.30

Step by Step Solution

1. Step 1: Write the proportion equation
   105,095.30 : 157,412.55 = 91,271.30 : x
2. Step 2: Convert to fraction form
   105,095.30/157,412.55 = 91,271.30/x
3. Step 3: Cross multiply
   105,095.30x = 157,412.55 × 91,271.30
4. Step 4: Simplify right side
   105,095.30x = 14,367,248,074.82
5. Step 5: Solve for x
   x = 14,367,248,074.82/105,095.30
6. Step 6: Final answer
   x = 136,706.86