Finding the Fourth Proportional to 52,478.32, 72,419.00 and 28,604.78

Step by Step Solution

1. Step 1: Write the proportion equation
   52,478.32 : 72,419.00 = 28,604.78 : x
2. Step 2: Convert to fraction form
   52,478.32/72,419.00 = 28,604.78/x
3. Step 3: Cross multiply
   52,478.32x = 72,419.00 × 28,604.78
4. Step 4: Simplify right side
   52,478.32x = 2,071,529,419.80
5. Step 5: Solve for x
   x = 2,071,529,419.80/52,478.32
6. Step 6: Final answer
   x = 39,474.01