Finding the Fourth Proportional to 259,196.76, 357,720.71 and 144,485.91

Step by Step Solution

1. Step 1: Write the proportion equation
   259,196.76 : 357,720.71 = 144,485.91 : x
2. Step 2: Convert to fraction form
   259,196.76/357,720.71 = 144,485.91/x
3. Step 3: Cross multiply
   259,196.76x = 357,720.71 × 144,485.91
4. Step 4: Simplify right side
   259,196.76x = 51,685,601,587.77
5. Step 5: Solve for x
   x = 51,685,601,587.77/259,196.76
6. Step 6: Final answer
   x = 199,406.82