Finding the Fourth Proportional to 42,792.21, 59,061.42 and 28,669.68

Step by Step Solution

1. Step 1: Write the proportion equation
   42,792.21 : 59,061.42 = 28,669.68 : x
2. Step 2: Convert to fraction form
   42,792.21/59,061.42 = 28,669.68/x
3. Step 3: Cross multiply
   42,792.21x = 59,061.42 × 28,669.68
4. Step 4: Simplify right side
   42,792.21x = 1,693,272,011.75
5. Step 5: Solve for x
   x = 1,693,272,011.75/42,792.21
6. Step 6: Final answer
   x = 39,569.63