Finding the Fourth Proportional to 89,061.45, 122,988.06 and 57,285.51

Step by Step Solution

1. Step 1: Write the proportion equation
   89,061.45 : 122,988.06 = 57,285.51 : x
2. Step 2: Convert to fraction form
   89,061.45/122,988.06 = 57,285.51/x
3. Step 3: Cross multiply
   89,061.45x = 122,988.06 × 57,285.51
4. Step 4: Simplify right side
   89,061.45x = 7,045,433,741.01
5. Step 5: Solve for x
   x = 7,045,433,741.01/89,061.45
6. Step 6: Final answer
   x = 79,107.56