Finding the Fourth Proportional to 452,573.72, 678,948.15 and 172,069.10

Step by Step Solution

1. Step 1: Write the proportion equation
   452,573.72 : 678,948.15 = 172,069.10 : x
2. Step 2: Convert to fraction form
   452,573.72/678,948.15 = 172,069.10/x
3. Step 3: Cross multiply
   452,573.72x = 678,948.15 × 172,069.10
4. Step 4: Simplify right side
   452,573.72x = 116,825,997,117.17
5. Step 5: Solve for x
   x = 116,825,997,117.17/452,573.72
6. Step 6: Final answer
   x = 258,136.94