Finding the Fourth Proportional to 89,162.40, 123,086.88 and 71,238.72

Step by Step Solution

1. Step 1: Write the proportion equation
   89,162.40 : 123,086.88 = 71,238.72 : x
2. Step 2: Convert to fraction form
   89,162.40/123,086.88 = 71,238.72/x
3. Step 3: Cross multiply
   89,162.40x = 123,086.88 × 71,238.72
4. Step 4: Simplify right side
   89,162.40x = 8,768,551,779.99
5. Step 5: Solve for x
   x = 8,768,551,779.99/89,162.40
6. Step 6: Final answer
   x = 98,343.60