Finding the Fourth Proportional to 155,122.29, 214,068.56 and 87,141.15

Step by Step Solution

1. Step 1: Write the proportion equation
   155,122.29 : 214,068.56 = 87,141.15 : x
2. Step 2: Convert to fraction form
   155,122.29/214,068.56 = 87,141.15/x
3. Step 3: Cross multiply
   155,122.29x = 214,068.56 × 87,141.15
4. Step 4: Simplify right side
   155,122.29x = 18,654,180,061.54
5. Step 5: Solve for x
   x = 18,654,180,061.54/155,122.29
6. Step 6: Final answer
   x = 120,254.67