Finding the Fourth Proportional to 45,030.43, 67,545.55 and 42,290.19

Step by Step Solution

1. Step 1: Write the proportion equation
   45,030.43 : 67,545.55 = 42,290.19 : x
2. Step 2: Convert to fraction form
   45,030.43/67,545.55 = 42,290.19/x
3. Step 3: Cross multiply
   45,030.43x = 67,545.55 × 42,290.19
4. Step 4: Simplify right side
   45,030.43x = 2,856,514,022.02
5. Step 5: Solve for x
   x = 2,856,514,022.02/45,030.43
6. Step 6: Final answer
   x = 63,435.19