Finding the Fourth Proportional to 52,431.91, 72,356.63 and 28,558.78

Step by Step Solution

1. Step 1: Write the proportion equation
   52,431.91 : 72,356.63 = 28,558.78 : x
2. Step 2: Convert to fraction form
   52,431.91/72,356.63 = 28,558.78/x
3. Step 3: Cross multiply
   52,431.91x = 72,356.63 × 28,558.78
4. Step 4: Simplify right side
   52,431.91x = 2,066,417,077.71
5. Step 5: Solve for x
   x = 2,066,417,077.71/52,431.91
6. Step 6: Final answer
   x = 39,411.44