Finding the Fourth Proportional to 101,019.52, 139,466.67 and 89,810.50

Step by Step Solution

1. Step 1: Write the proportion equation
   101,019.52 : 139,466.67 = 89,810.50 : x
2. Step 2: Convert to fraction form
   101,019.52/139,466.67 = 89,810.50/x
3. Step 3: Cross multiply
   101,019.52x = 139,466.67 × 89,810.50
4. Step 4: Simplify right side
   101,019.52x = 12,525,571,366.04
5. Step 5: Solve for x
   x = 12,525,571,366.04/101,019.52
6. Step 6: Final answer
   x = 123,991.59