Finding the Fourth Proportional to 259,522.61, 389,264.48 and 72,548.69

Step by Step Solution

1. Step 1: Write the proportion equation
   259,522.61 : 389,264.48 = 72,548.69 : x
2. Step 2: Convert to fraction form
   259,522.61/389,264.48 = 72,548.69/x
3. Step 3: Cross multiply
   259,522.61x = 389,264.48 × 72,548.69
4. Step 4: Simplify right side
   259,522.61x = 28,240,627,724.79
5. Step 5: Solve for x
   x = 28,240,627,724.79/259,522.61
6. Step 6: Final answer
   x = 108,817.60