Finding the Fourth Proportional to 91,106.42, 136,659.42 and 31,909.59

Step by Step Solution

1. Step 1: Write the proportion equation
   91,106.42 : 136,659.42 = 31,909.59 : x
2. Step 2: Convert to fraction form
   91,106.42/136,659.42 = 31,909.59/x
3. Step 3: Cross multiply
   91,106.42x = 136,659.42 × 31,909.59
4. Step 4: Simplify right side
   91,106.42x = 4,360,746,061.84
5. Step 5: Solve for x
   x = 4,360,746,061.84/91,106.42
6. Step 6: Final answer
   x = 47,864.31