Finding the Fourth Proportional to 259,480.02, 389,242.71 and 72,492.06

Step by Step Solution

1. Step 1: Write the proportion equation
   259,480.02 : 389,242.71 = 72,492.06 : x
2. Step 2: Convert to fraction form
   259,480.02/389,242.71 = 72,492.06/x
3. Step 3: Cross multiply
   259,480.02x = 389,242.71 × 72,492.06
4. Step 4: Simplify right side
   259,480.02x = 28,217,005,887.88
5. Step 5: Solve for x
   x = 28,217,005,887.88/259,480.02
6. Step 6: Final answer
   x = 108,744.43