Finding the Fourth Proportional to 357,012.78, 535,256.73 and 170,155.50

Step by Step Solution

1. Step 1: Write the proportion equation
   357,012.78 : 535,256.73 = 170,155.50 : x
2. Step 2: Convert to fraction form
   357,012.78/535,256.73 = 170,155.50/x
3. Step 3: Cross multiply
   357,012.78x = 535,256.73 × 170,155.50
4. Step 4: Simplify right side
   357,012.78x = 91,076,876,521.52
5. Step 5: Solve for x
   x = 91,076,876,521.52/357,012.78
6. Step 6: Final answer
   x = 255,108.17