Finding the Fourth Proportional to 49,836, 74,758.32 and 12,900

Step by Step Solution

1. Step 1: Write the proportion equation
   49,836 : 74,758.32 = 12,900 : x
2. Step 2: Convert to fraction form
   49,836/74,758.32 = 12,900/x
3. Step 3: Cross multiply
   49,836x = 74,758.32 × 12,900
4. Step 4: Simplify right side
   49,836x = 964,382,328.00
5. Step 5: Solve for x
   x = 964,382,328.00/49,836
6. Step 6: Final answer
   x = 19,351.12