Finding the Fourth Proportional to 52,642.90, 72,646.81 and 28,769.05

Step by Step Solution

1. Step 1: Write the proportion equation
   52,642.90 : 72,646.81 = 28,769.05 : x
2. Step 2: Convert to fraction form
   52,642.90/72,646.81 = 28,769.05/x
3. Step 3: Cross multiply
   52,642.90x = 72,646.81 × 28,769.05
4. Step 4: Simplify right side
   52,642.90x = 2,089,979,709.23
5. Step 5: Solve for x
   x = 2,089,979,709.23/52,642.90
6. Step 6: Final answer
   x = 39,701.07