Finding the Fourth Proportional to 315,886.72, 435,774.72 and 186,738.16

Step by Step Solution

1. Step 1: Write the proportion equation
   315,886.72 : 435,774.72 = 186,738.16 : x
2. Step 2: Convert to fraction form
   315,886.72/435,774.72 = 186,738.16/x
3. Step 3: Cross multiply
   315,886.72x = 435,774.72 × 186,738.16
4. Step 4: Simplify right side
   315,886.72x = 81,375,769,387.32
5. Step 5: Solve for x
   x = 81,375,769,387.32/315,886.72
6. Step 6: Final answer
   x = 257,610.61