Finding the Fourth Proportional to 345,591.63, 518,309.69 and 123,975.63

Step by Step Solution

1. Step 1: Write the proportion equation
   345,591.63 : 518,309.69 = 123,975.63 : x
2. Step 2: Convert to fraction form
   345,591.63/518,309.69 = 123,975.63/x
3. Step 3: Cross multiply
   345,591.63x = 518,309.69 × 123,975.63
4. Step 4: Simplify right side
   345,591.63x = 64,257,769,732.98
5. Step 5: Solve for x
   x = 64,257,769,732.98/345,591.63
6. Step 6: Final answer
   x = 185,935.55