Finding the Fourth Proportional to 51,019.05, 70,417.72 and 28,365.99

Step by Step Solution

1. Step 1: Write the proportion equation
   51,019.05 : 70,417.72 = 28,365.99 : x
2. Step 2: Convert to fraction form
   51,019.05/70,417.72 = 28,365.99/x
3. Step 3: Cross multiply
   51,019.05x = 70,417.72 × 28,365.99
4. Step 4: Simplify right side
   51,019.05x = 1,997,468,341.34
5. Step 5: Solve for x
   x = 1,997,468,341.34/51,019.05
6. Step 6: Final answer
   x = 39,151.42