Finding the Fourth Proportional to 72,775.51, 109,204.17 and 28,405.33

Step by Step Solution

1. Step 1: Write the proportion equation
   72,775.51 : 109,204.17 = 28,405.33 : x
2. Step 2: Convert to fraction form
   72,775.51/109,204.17 = 28,405.33/x
3. Step 3: Cross multiply
   72,775.51x = 109,204.17 × 28,405.33
4. Step 4: Simplify right side
   72,775.51x = 3,101,980,486.23
5. Step 5: Solve for x
   x = 3,101,980,486.23/72,775.51
6. Step 6: Final answer
   x = 42,623.96