Finding the Fourth Proportional to 86,930.10, 130,103.55 and 86,930.10

Step by Step Solution

1. Step 1: Write the proportion equation
   86,930.10 : 130,103.55 = 86,930.10 : x
2. Step 2: Convert to fraction form
   86,930.10/130,103.55 = 86,930.10/x
3. Step 3: Cross multiply
   86,930.10x = 130,103.55 × 86,930.10
4. Step 4: Simplify right side
   86,930.10x = 11,309,914,611.86
5. Step 5: Solve for x
   x = 11,309,914,611.86/86,930.10
6. Step 6: Final answer
   x = 130,103.55