Finding the Fourth Proportional to 42,321.78, 58,409.55 and 27,798.50

Step by Step Solution

1. Step 1: Write the proportion equation
   42,321.78 : 58,409.55 = 27,798.50 : x
2. Step 2: Convert to fraction form
   42,321.78/58,409.55 = 27,798.50/x
3. Step 3: Cross multiply
   42,321.78x = 58,409.55 × 27,798.50
4. Step 4: Simplify right side
   42,321.78x = 1,623,697,583.63
5. Step 5: Solve for x
   x = 1,623,697,583.63/42,321.78
6. Step 6: Final answer
   x = 38,365.53