Finding the Fourth Proportional to 9,139.32, 12,612.29 and 4,947.56

Step by Step Solution

1. Step 1: Write the proportion equation
   9,139.32 : 12,612.29 = 4,947.56 : x
2. Step 2: Convert to fraction form
   9,139.32/12,612.29 = 4,947.56/x
3. Step 3: Cross multiply
   9,139.32x = 12,612.29 × 4,947.56
4. Step 4: Simplify right side
   9,139.32x = 62,400,061.51
5. Step 5: Solve for x
   x = 62,400,061.51/9,139.32
6. Step 6: Final answer
   x = 6,827.65