Finding the Fourth Proportional to 23,604.32, 32,572.72 and 12,991.98

Step by Step Solution

1. Step 1: Write the proportion equation
   23,604.32 : 32,572.72 = 12,991.98 : x
2. Step 2: Convert to fraction form
   23,604.32/32,572.72 = 12,991.98/x
3. Step 3: Cross multiply
   23,604.32x = 32,572.72 × 12,991.98
4. Step 4: Simplify right side
   23,604.32x = 423,184,126.79
5. Step 5: Solve for x
   x = 423,184,126.79/23,604.32
6. Step 6: Final answer
   x = 17,928.25