Finding the Fourth Proportional to 220,607, 331,019.86 and 87,484.30

Step by Step Solution

1. Step 1: Write the proportion equation
   220,607 : 331,019.86 = 87,484.30 : x
2. Step 2: Convert to fraction form
   220,607/331,019.86 = 87,484.30/x
3. Step 3: Cross multiply
   220,607x = 331,019.86 × 87,484.30
4. Step 4: Simplify right side
   220,607x = 28,959,040,738.20
5. Step 5: Solve for x
   x = 28,959,040,738.20/220,607
6. Step 6: Final answer
   x = 131,269.82