Finding the Fourth Proportional to 89,123.62, 122,978.89 and 53,300.56

Step by Step Solution

1. Step 1: Write the proportion equation
   89,123.62 : 122,978.89 = 53,300.56 : x
2. Step 2: Convert to fraction form
   89,123.62/122,978.89 = 53,300.56/x
3. Step 3: Cross multiply
   89,123.62x = 122,978.89 × 53,300.56
4. Step 4: Simplify right side
   89,123.62x = 6,554,843,705.18
5. Step 5: Solve for x
   x = 6,554,843,705.18/89,123.62
6. Step 6: Final answer
   x = 73,547.77