Finding the Fourth Proportional to 189,065.39, 260,898.50 and 108,499.55

Step by Step Solution

1. Step 1: Write the proportion equation
   189,065.39 : 260,898.50 = 108,499.55 : x
2. Step 2: Convert to fraction form
   189,065.39/260,898.50 = 108,499.55/x
3. Step 3: Cross multiply
   189,065.39x = 260,898.50 × 108,499.55
4. Step 4: Simplify right side
   189,065.39x = 28,307,368,812.43
5. Step 5: Solve for x
   x = 28,307,368,812.43/189,065.39
6. Step 6: Final answer
   x = 149,722.64