Finding the Fourth Proportional to 42,981.59, 64,396.10 and 17,966.49

Step by Step Solution

1. Step 1: Write the proportion equation
   42,981.59 : 64,396.10 = 17,966.49 : x
2. Step 2: Convert to fraction form
   42,981.59/64,396.10 = 17,966.49/x
3. Step 3: Cross multiply
   42,981.59x = 64,396.10 × 17,966.49
4. Step 4: Simplify right side
   42,981.59x = 1,156,971,931.61
5. Step 5: Solve for x
   x = 1,156,971,931.61/42,981.59
6. Step 6: Final answer
   x = 26,917.85