Finding the Fourth Proportional to 316,196.94, 436,342.50 and 172,953.89

Step by Step Solution

1. Step 1: Write the proportion equation
   316,196.94 : 436,342.50 = 172,953.89 : x
2. Step 2: Convert to fraction form
   316,196.94/436,342.50 = 172,953.89/x
3. Step 3: Cross multiply
   316,196.94x = 436,342.50 × 172,953.89
4. Step 4: Simplify right side
   316,196.94x = 75,467,130,565.61
5. Step 5: Solve for x
   x = 75,467,130,565.61/316,196.94
6. Step 6: Final answer
   x = 238,671.29