Finding the Fourth Proportional to 87,019.94, 120,109.30 and 53,466.50

Step by Step Solution

1. Step 1: Write the proportion equation
   87,019.94 : 120,109.30 = 53,466.50 : x
2. Step 2: Convert to fraction form
   87,019.94/120,109.30 = 53,466.50/x
3. Step 3: Cross multiply
   87,019.94x = 120,109.30 × 53,466.50
4. Step 4: Simplify right side
   87,019.94x = 6,421,823,888.45
5. Step 5: Solve for x
   x = 6,421,823,888.45/87,019.94
6. Step 6: Final answer
   x = 73,797.15