Finding the Fourth Proportional to 42,837.58, 64,269.51 and 19,165.05

Step by Step Solution

1. Step 1: Write the proportion equation
   42,837.58 : 64,269.51 = 19,165.05 : x
2. Step 2: Convert to fraction form
   42,837.58/64,269.51 = 19,165.05/x
3. Step 3: Cross multiply
   42,837.58x = 64,269.51 × 19,165.05
4. Step 4: Simplify right side
   42,837.58x = 1,231,728,300.76
5. Step 5: Solve for x
   x = 1,231,728,300.76/42,837.58
6. Step 6: Final answer
   x = 28,753.45