Finding the Fourth Proportional to 91,826.10, 137,739.15 and 91,826.10

Step by Step Solution

1. Step 1: Write the proportion equation
   91,826.10 : 137,739.15 = 91,826.10 : x
2. Step 2: Convert to fraction form
   91,826.10/137,739.15 = 91,826.10/x
3. Step 3: Cross multiply
   91,826.10x = 137,739.15 × 91,826.10
4. Step 4: Simplify right side
   91,826.10x = 12,648,048,961.82
5. Step 5: Solve for x
   x = 12,648,048,961.82/91,826.10
6. Step 6: Final answer
   x = 137,739.15