Finding the Fourth Proportional to 89,970.06, 123,258.42 and 86,605.74

Step by Step Solution

1. Step 1: Write the proportion equation
   89,970.06 : 123,258.42 = 86,605.74 : x
2. Step 2: Convert to fraction form
   89,970.06/123,258.42 = 86,605.74/x
3. Step 3: Cross multiply
   89,970.06x = 123,258.42 × 86,605.74
4. Step 4: Simplify right side
   89,970.06x = 10,674,886,675.33
5. Step 5: Solve for x
   x = 10,674,886,675.33/89,970.06
6. Step 6: Final answer
   x = 118,649.32