Finding the Fourth Proportional to 89,128.50, 122,997.33 and 53,320.02

Step by Step Solution

1. Step 1: Write the proportion equation
   89,128.50 : 122,997.33 = 53,320.02 : x
2. Step 2: Convert to fraction form
   89,128.50/122,997.33 = 53,320.02/x
3. Step 3: Cross multiply
   89,128.50x = 122,997.33 × 53,320.02
4. Step 4: Simplify right side
   89,128.50x = 6,558,220,095.55
5. Step 5: Solve for x
   x = 6,558,220,095.55/89,128.50
6. Step 6: Final answer
   x = 73,581.63