Finding the Fourth Proportional to 155,054.32, 213,972.24 and 87,071.84

Step by Step Solution

1. Step 1: Write the proportion equation
   155,054.32 : 213,972.24 = 87,071.84 : x
2. Step 2: Convert to fraction form
   155,054.32/213,972.24 = 87,071.84/x
3. Step 3: Cross multiply
   155,054.32x = 213,972.24 × 87,071.84
4. Step 4: Simplify right side
   155,054.32x = 18,630,956,645.72
5. Step 5: Solve for x
   x = 18,630,956,645.72/155,054.32
6. Step 6: Final answer
   x = 120,157.61