Finding the Fourth Proportional to 89,918.55, 124,090.61 and 49,085.10

Step by Step Solution

1. Step 1: Write the proportion equation
   89,918.55 : 124,090.61 = 49,085.10 : x
2. Step 2: Convert to fraction form
   89,918.55/124,090.61 = 49,085.10/x
3. Step 3: Cross multiply
   89,918.55x = 124,090.61 × 49,085.10
4. Step 4: Simplify right side
   89,918.55x = 6,090,999,755.49
5. Step 5: Solve for x
   x = 6,090,999,755.49/89,918.55
6. Step 6: Final answer
   x = 67,739.08