Finding the Fourth Proportional to 12,976.32, 19,455.60 and 4,656.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,976.32 : 19,455.60 = 4,656.15 : x
2. Step 2: Convert to fraction form
   12,976.32/19,455.60 = 4,656.15/x
3. Step 3: Cross multiply
   12,976.32x = 19,455.60 × 4,656.15
4. Step 4: Simplify right side
   12,976.32x = 90,588,191.94
5. Step 5: Solve for x
   x = 90,588,191.94/12,976.32
6. Step 6: Final answer
   x = 6,981.04