Finding the Fourth Proportional to 109,513.17, 150,991.26 and 91,390.01

Step by Step Solution

1. Step 1: Write the proportion equation
   109,513.17 : 150,991.26 = 91,390.01 : x
2. Step 2: Convert to fraction form
   109,513.17/150,991.26 = 91,390.01/x
3. Step 3: Cross multiply
   109,513.17x = 150,991.26 × 91,390.01
4. Step 4: Simplify right side
   109,513.17x = 13,799,092,761.31
5. Step 5: Solve for x
   x = 13,799,092,761.31/109,513.17
6. Step 6: Final answer
   x = 126,003.96