Finding the Fourth Proportional to 81,499.36, 122,208.72 and 28,900.96

Step by Step Solution

1. Step 1: Write the proportion equation
   81,499.36 : 122,208.72 = 28,900.96 : x
2. Step 2: Convert to fraction form
   81,499.36/122,208.72 = 28,900.96/x
3. Step 3: Cross multiply
   81,499.36x = 122,208.72 × 28,900.96
4. Step 4: Simplify right side
   81,499.36x = 3,531,949,328.37
5. Step 5: Solve for x
   x = 3,531,949,328.37/81,499.36
6. Step 6: Final answer
   x = 43,337.14