Finding the Fourth Proportional to 42,899.91, 64,323.86 and 19,203.09

Step by Step Solution

1. Step 1: Write the proportion equation
   42,899.91 : 64,323.86 = 19,203.09 : x
2. Step 2: Convert to fraction form
   42,899.91/64,323.86 = 19,203.09/x
3. Step 3: Cross multiply
   42,899.91x = 64,323.86 × 19,203.09
4. Step 4: Simplify right side
   42,899.91x = 1,235,216,776.71
5. Step 5: Solve for x
   x = 1,235,216,776.71/42,899.91
6. Step 6: Final answer
   x = 28,792.99