Finding the Fourth Proportional to 42,636.66, 63,976.59 and 28,756.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,636.66 : 63,976.59 = 28,756.50 : x
2. Step 2: Convert to fraction form
   42,636.66/63,976.59 = 28,756.50/x
3. Step 3: Cross multiply
   42,636.66x = 63,976.59 × 28,756.50
4. Step 4: Simplify right side
   42,636.66x = 1,839,742,810.34
5. Step 5: Solve for x
   x = 1,839,742,810.34/42,636.66
6. Step 6: Final answer
   x = 43,149.32