Finding the Fourth Proportional to 155,514.18, 214,674.57 and 105,242.34

Step by Step Solution

1. Step 1: Write the proportion equation
   155,514.18 : 214,674.57 = 105,242.34 : x
2. Step 2: Convert to fraction form
   155,514.18/214,674.57 = 105,242.34/x
3. Step 3: Cross multiply
   155,514.18x = 214,674.57 × 105,242.34
4. Step 4: Simplify right side
   155,514.18x = 22,592,854,085.29
5. Step 5: Solve for x
   x = 22,592,854,085.29/155,514.18
6. Step 6: Final answer
   x = 145,278.42