Finding the Fourth Proportional to 258,520.17, 387,779.67 and 123,173.40

Step by Step Solution

1. Step 1: Write the proportion equation
   258,520.17 : 387,779.67 = 123,173.40 : x
2. Step 2: Convert to fraction form
   258,520.17/387,779.67 = 123,173.40/x
3. Step 3: Cross multiply
   258,520.17x = 387,779.67 × 123,173.40
4. Step 4: Simplify right side
   258,520.17x = 47,764,140,404.78
5. Step 5: Solve for x
   x = 47,764,140,404.78/258,520.17
6. Step 6: Final answer
   x = 184,759.82