Finding the Fourth Proportional to 12,903.71, 19,356.47 and 5,112.50

Step by Step Solution

1. Step 1: Write the proportion equation
   12,903.71 : 19,356.47 = 5,112.50 : x
2. Step 2: Convert to fraction form
   12,903.71/19,356.47 = 5,112.50/x
3. Step 3: Cross multiply
   12,903.71x = 19,356.47 × 5,112.50
4. Step 4: Simplify right side
   12,903.71x = 98,959,927.31
5. Step 5: Solve for x
   x = 98,959,927.31/12,903.71
6. Step 6: Final answer
   x = 7,669.11