Finding the Fourth Proportional to 42,490.51, 63,735.91 and 19,089.61

Step by Step Solution

1. Step 1: Write the proportion equation
   42,490.51 : 63,735.91 = 19,089.61 : x
2. Step 2: Convert to fraction form
   42,490.51/63,735.91 = 19,089.61/x
3. Step 3: Cross multiply
   42,490.51x = 63,735.91 × 19,089.61
4. Step 4: Simplify right side
   42,490.51x = 1,216,693,457.83
5. Step 5: Solve for x
   x = 1,216,693,457.83/42,490.51
6. Step 6: Final answer
   x = 28,634.48