Finding the Fourth Proportional to 52,478.07, 72,420.89 and 28,605.93

Step by Step Solution

1. Step 1: Write the proportion equation
   52,478.07 : 72,420.89 = 28,605.93 : x
2. Step 2: Convert to fraction form
   52,478.07/72,420.89 = 28,605.93/x
3. Step 3: Cross multiply
   52,478.07x = 72,420.89 × 28,605.93
4. Step 4: Simplify right side
   52,478.07x = 2,071,666,909.88
5. Step 5: Solve for x
   x = 2,071,666,909.88/52,478.07
6. Step 6: Final answer
   x = 39,476.81