Finding the Fourth Proportional to 101,156.67, 139,661.96 and 90,528.03

Step by Step Solution

1. Step 1: Write the proportion equation
   101,156.67 : 139,661.96 = 90,528.03 : x
2. Step 2: Convert to fraction form
   101,156.67/139,661.96 = 90,528.03/x
3. Step 3: Cross multiply
   101,156.67x = 139,661.96 × 90,528.03
4. Step 4: Simplify right side
   101,156.67x = 12,643,322,104.74
5. Step 5: Solve for x
   x = 12,643,322,104.74/101,156.67
6. Step 6: Final answer
   x = 124,987.53