Finding the Fourth Proportional to 22,300.84, 30,776.52 and 12,870.01

Step by Step Solution

1. Step 1: Write the proportion equation
   22,300.84 : 30,776.52 = 12,870.01 : x
2. Step 2: Convert to fraction form
   22,300.84/30,776.52 = 12,870.01/x
3. Step 3: Cross multiply
   22,300.84x = 30,776.52 × 12,870.01
4. Step 4: Simplify right side
   22,300.84x = 396,094,120.17
5. Step 5: Solve for x
   x = 396,094,120.17/22,300.84
6. Step 6: Final answer
   x = 17,761.40