Finding the Fourth Proportional to 315,315.59, 435,144.69 and 172,084.91

Step by Step Solution

1. Step 1: Write the proportion equation
   315,315.59 : 435,144.69 = 172,084.91 : x
2. Step 2: Convert to fraction form
   315,315.59/435,144.69 = 172,084.91/x
3. Step 3: Cross multiply
   315,315.59x = 435,144.69 × 172,084.91
4. Step 4: Simplify right side
   315,315.59x = 74,881,832,639.90
5. Step 5: Solve for x
   x = 74,881,832,639.90/315,315.59
6. Step 6: Final answer
   x = 237,482.18