Finding the Fourth Proportional to 52,479.86, 72,420.77 and 28,607

Step by Step Solution

1. Step 1: Write the proportion equation
   52,479.86 : 72,420.77 = 28,607 : x
2. Step 2: Convert to fraction form
   52,479.86/72,420.77 = 28,607/x
3. Step 3: Cross multiply
   52,479.86x = 72,420.77 × 28,607
4. Step 4: Simplify right side
   52,479.86x = 2,071,740,824.36
5. Step 5: Solve for x
   x = 2,071,740,824.36/52,479.86
6. Step 6: Final answer
   x = 39,476.87