Finding the Fourth Proportional to 42,003.60, 62,908.20 and 28,784.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,003.60 : 62,908.20 = 28,784.40 : x
2. Step 2: Convert to fraction form
   42,003.60/62,908.20 = 28,784.40/x
3. Step 3: Cross multiply
   42,003.60x = 62,908.20 × 28,784.40
4. Step 4: Simplify right side
   42,003.60x = 1,810,774,792.08
5. Step 5: Solve for x
   x = 1,810,774,792.08/42,003.60
6. Step 6: Final answer
   x = 43,109.99