Finding the Fourth Proportional to 316,074.72, 436,147.29 and 187,017.15

Step by Step Solution

1. Step 1: Write the proportion equation
   316,074.72 : 436,147.29 = 187,017.15 : x
2. Step 2: Convert to fraction form
   316,074.72/436,147.29 = 187,017.15/x
3. Step 3: Cross multiply
   316,074.72x = 436,147.29 × 187,017.15
4. Step 4: Simplify right side
   316,074.72x = 81,567,023,156.02
5. Step 5: Solve for x
   x = 81,567,023,156.02/316,074.72
6. Step 6: Final answer
   x = 258,062.47