Finding the Fourth Proportional to 42,891.80, 64,315.76 and 17,925.03

Step by Step Solution

1. Step 1: Write the proportion equation
   42,891.80 : 64,315.76 = 17,925.03 : x
2. Step 2: Convert to fraction form
   42,891.80/64,315.76 = 17,925.03/x
3. Step 3: Cross multiply
   42,891.80x = 64,315.76 × 17,925.03
4. Step 4: Simplify right side
   42,891.80x = 1,152,861,837.85
5. Step 5: Solve for x
   x = 1,152,861,837.85/42,891.80
6. Step 6: Final answer
   x = 26,878.38