Finding the Fourth Proportional to 42,012, 63,026.64 and 17,388

Step by Step Solution

1. Step 1: Write the proportion equation
   42,012 : 63,026.64 = 17,388 : x
2. Step 2: Convert to fraction form
   42,012/63,026.64 = 17,388/x
3. Step 3: Cross multiply
   42,012x = 63,026.64 × 17,388
4. Step 4: Simplify right side
   42,012x = 1,095,907,216.32
5. Step 5: Solve for x
   x = 1,095,907,216.32/42,012
6. Step 6: Final answer
   x = 26,085.58