Finding the Fourth Proportional to 275,436.50, 413,223.87 and 78,444.50

Step by Step Solution

1. Step 1: Write the proportion equation
   275,436.50 : 413,223.87 = 78,444.50 : x
2. Step 2: Convert to fraction form
   275,436.50/413,223.87 = 78,444.50/x
3. Step 3: Cross multiply
   275,436.50x = 413,223.87 × 78,444.50
4. Step 4: Simplify right side
   275,436.50x = 32,415,139,870.22
5. Step 5: Solve for x
   x = 32,415,139,870.22/275,436.50
6. Step 6: Final answer
   x = 117,686.44