Finding the Fourth Proportional to 42,890.90, 64,336.83 and 17,934.74

Step by Step Solution

1. Step 1: Write the proportion equation
   42,890.90 : 64,336.83 = 17,934.74 : x
2. Step 2: Convert to fraction form
   42,890.90/64,336.83 = 17,934.74/x
3. Step 3: Cross multiply
   42,890.90x = 64,336.83 × 17,934.74
4. Step 4: Simplify right side
   42,890.90x = 1,153,864,318.47
5. Step 5: Solve for x
   x = 1,153,864,318.47/42,890.90
6. Step 6: Final answer
   x = 26,902.31