Finding the Fourth Proportional to 42,888.42, 64,310.69 and 17,921.66

Step by Step Solution

1. Step 1: Write the proportion equation
   42,888.42 : 64,310.69 = 17,921.66 : x
2. Step 2: Convert to fraction form
   42,888.42/64,310.69 = 17,921.66/x
3. Step 3: Cross multiply
   42,888.42x = 64,310.69 × 17,921.66
4. Step 4: Simplify right side
   42,888.42x = 1,152,554,043.80
5. Step 5: Solve for x
   x = 1,152,554,043.80/42,888.42
6. Step 6: Final answer
   x = 26,873.32