Finding the Fourth Proportional to 105,544.62, 145,588.59 and 91,372.86

Step by Step Solution

1. Step 1: Write the proportion equation
   105,544.62 : 145,588.59 = 91,372.86 : x
2. Step 2: Convert to fraction form
   105,544.62/145,588.59 = 91,372.86/x
3. Step 3: Cross multiply
   105,544.62x = 145,588.59 × 91,372.86
4. Step 4: Simplify right side
   105,544.62x = 13,302,845,851.67
5. Step 5: Solve for x
   x = 13,302,845,851.67/105,544.62
6. Step 6: Final answer
   x = 126,040.02