Finding the Fourth Proportional to 102,870.12, 154,146.42 and 69,459.24

Step by Step Solution

1. Step 1: Write the proportion equation
   102,870.12 : 154,146.42 = 69,459.24 : x
2. Step 2: Convert to fraction form
   102,870.12/154,146.42 = 69,459.24/x
3. Step 3: Cross multiply
   102,870.12x = 154,146.42 × 69,459.24
4. Step 4: Simplify right side
   102,870.12x = 10,706,893,181.92
5. Step 5: Solve for x
   x = 10,706,893,181.92/102,870.12
6. Step 6: Final answer
   x = 104,081.66