Finding the Fourth Proportional to 105,789.60, 148,499.10 and 105,789.60

Step by Step Solution

1. Step 1: Write the proportion equation
   105,789.60 : 148,499.10 = 105,789.60 : x
2. Step 2: Convert to fraction form
   105,789.60/148,499.10 = 105,789.60/x
3. Step 3: Cross multiply
   105,789.60x = 148,499.10 × 105,789.60
4. Step 4: Simplify right side
   105,789.60x = 15,709,660,389.36
5. Step 5: Solve for x
   x = 15,709,660,389.36/105,789.60
6. Step 6: Final answer
   x = 148,499.10