Finding the Fourth Proportional to 102,885.52, 142,030.56 and 77,401.62

Step by Step Solution

1. Step 1: Write the proportion equation
   102,885.52 : 142,030.56 = 77,401.62 : x
2. Step 2: Convert to fraction form
   102,885.52/142,030.56 = 77,401.62/x
3. Step 3: Cross multiply
   102,885.52x = 142,030.56 × 77,401.62
4. Step 4: Simplify right side
   102,885.52x = 10,993,395,433.51
5. Step 5: Solve for x
   x = 10,993,395,433.51/102,885.52
6. Step 6: Final answer
   x = 106,850.75