Finding the Fourth Proportional to 52,428.78, 72,352.89 and 28,555.47

Step by Step Solution

1. Step 1: Write the proportion equation
   52,428.78 : 72,352.89 = 28,555.47 : x
2. Step 2: Convert to fraction form
   52,428.78/72,352.89 = 28,555.47/x
3. Step 3: Cross multiply
   52,428.78x = 72,352.89 × 28,555.47
4. Step 4: Simplify right side
   52,428.78x = 2,066,070,779.81
5. Step 5: Solve for x
   x = 2,066,070,779.81/52,428.78
6. Step 6: Final answer
   x = 39,407.19