Finding the Fourth Proportional to 316,300.10, 436,493.85 and 173,060.72

Step by Step Solution

1. Step 1: Write the proportion equation
   316,300.10 : 436,493.85 = 173,060.72 : x
2. Step 2: Convert to fraction form
   316,300.10/436,493.85 = 173,060.72/x
3. Step 3: Cross multiply
   316,300.10x = 436,493.85 × 173,060.72
4. Step 4: Simplify right side
   316,300.10x = 75,539,939,956.57
5. Step 5: Solve for x
   x = 75,539,939,956.57/316,300.10
6. Step 6: Final answer
   x = 238,823.64