Finding the Fourth Proportional to 108,429.42, 162,741.33 and 90,770.61

Step by Step Solution

1. Step 1: Write the proportion equation
   108,429.42 : 162,741.33 = 90,770.61 : x
2. Step 2: Convert to fraction form
   108,429.42/162,741.33 = 90,770.61/x
3. Step 3: Cross multiply
   108,429.42x = 162,741.33 × 90,770.61
4. Step 4: Simplify right side
   108,429.42x = 14,772,129,796.31
5. Step 5: Solve for x
   x = 14,772,129,796.31/108,429.42
6. Step 6: Final answer
   x = 136,237.29