Finding the Fourth Proportional to 105,790.10, 148,499.80 and 105,790.10

Step by Step Solution

1. Step 1: Write the proportion equation
   105,790.10 : 148,499.80 = 105,790.10 : x
2. Step 2: Convert to fraction form
   105,790.10/148,499.80 = 105,790.10/x
3. Step 3: Cross multiply
   105,790.10x = 148,499.80 × 105,790.10
4. Step 4: Simplify right side
   105,790.10x = 15,709,808,691.98
5. Step 5: Solve for x
   x = 15,709,808,691.98/105,790.10
6. Step 6: Final answer
   x = 148,499.80