Finding the Fourth Proportional to 28,507.55, 42,764.05 and 8,789.01

Step by Step Solution

1. Step 1: Write the proportion equation
   28,507.55 : 42,764.05 = 8,789.01 : x
2. Step 2: Convert to fraction form
   28,507.55/42,764.05 = 8,789.01/x
3. Step 3: Cross multiply
   28,507.55x = 42,764.05 × 8,789.01
4. Step 4: Simplify right side
   28,507.55x = 375,853,513.71
5. Step 5: Solve for x
   x = 375,853,513.71/28,507.55
6. Step 6: Final answer
   x = 13,184.35