Finding the Fourth Proportional to 155,002.18, 213,888.25 and 87,003.57

Step by Step Solution

1. Step 1: Write the proportion equation
   155,002.18 : 213,888.25 = 87,003.57 : x
2. Step 2: Convert to fraction form
   155,002.18/213,888.25 = 87,003.57/x
3. Step 3: Cross multiply
   155,002.18x = 213,888.25 × 87,003.57
4. Step 4: Simplify right side
   155,002.18x = 18,609,040,549.37
5. Step 5: Solve for x
   x = 18,609,040,549.37/155,002.18
6. Step 6: Final answer
   x = 120,056.64