Finding the Fourth Proportional to 102,858.38, 154,186.34 and 60,109.55

Step by Step Solution

1. Step 1: Write the proportion equation
   102,858.38 : 154,186.34 = 60,109.55 : x
2. Step 2: Convert to fraction form
   102,858.38/154,186.34 = 60,109.55/x
3. Step 3: Cross multiply
   102,858.38x = 154,186.34 × 60,109.55
4. Step 4: Simplify right side
   102,858.38x = 9,268,070,892.89
5. Step 5: Solve for x
   x = 9,268,070,892.89/102,858.38
6. Step 6: Final answer
   x = 90,105.17