Finding the Fourth Proportional to 42,004.64, 63,007.42 and 17,985.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42,004.64 : 63,007.42 = 17,985.70 : x
2. Step 2: Convert to fraction form
   42,004.64/63,007.42 = 17,985.70/x
3. Step 3: Cross multiply
   42,004.64x = 63,007.42 × 17,985.70
4. Step 4: Simplify right side
   42,004.64x = 1,133,232,553.89
5. Step 5: Solve for x
   x = 1,133,232,553.89/42,004.64
6. Step 6: Final answer
   x = 26,978.75