Finding the Fourth Proportional to 259,362.72, 389,051.28 and 72,374.04

Step by Step Solution

1. Step 1: Write the proportion equation
   259,362.72 : 389,051.28 = 72,374.04 : x
2. Step 2: Convert to fraction form
   259,362.72/389,051.28 = 72,374.04/x
3. Step 3: Cross multiply
   259,362.72x = 389,051.28 × 72,374.04
4. Step 4: Simplify right side
   259,362.72x = 28,157,212,900.77
5. Step 5: Solve for x
   x = 28,157,212,900.77/259,362.72
6. Step 6: Final answer
   x = 108,563.07