Finding the Fourth Proportional to 102,104.20, 152,810.70 and 89,662.60

Step by Step Solution

1. Step 1: Write the proportion equation
   102,104.20 : 152,810.70 = 89,662.60 : x
2. Step 2: Convert to fraction form
   102,104.20/152,810.70 = 89,662.60/x
3. Step 3: Cross multiply
   102,104.20x = 152,810.70 × 89,662.60
4. Step 4: Simplify right side
   102,104.20x = 13,701,404,669.82
5. Step 5: Solve for x
   x = 13,701,404,669.82/102,104.20
6. Step 6: Final answer
   x = 134,190.41