Finding the Fourth Proportional to 89,123.56, 122,978.84 and 53,300.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,123.56 : 122,978.84 = 53,300.50 : x
2. Step 2: Convert to fraction form
   89,123.56/122,978.84 = 53,300.50/x
3. Step 3: Cross multiply
   89,123.56x = 122,978.84 × 53,300.50
4. Step 4: Simplify right side
   89,123.56x = 6,554,833,661.42
5. Step 5: Solve for x
   x = 6,554,833,661.42/89,123.56
6. Step 6: Final answer
   x = 73,547.71