Finding the Fourth Proportional to 42,838.29, 64,213.29 and 17,892.90

Step by Step Solution

1. Step 1: Write the proportion equation
   42,838.29 : 64,213.29 = 17,892.90 : x
2. Step 2: Convert to fraction form
   42,838.29/64,213.29 = 17,892.90/x
3. Step 3: Cross multiply
   42,838.29x = 64,213.29 × 17,892.90
4. Step 4: Simplify right side
   42,838.29x = 1,148,961,976.64
5. Step 5: Solve for x
   x = 1,148,961,976.64/42,838.29
6. Step 6: Final answer
   x = 26,820.91