Finding the Fourth Proportional to 42,498.07, 63,743.05 and 12,916.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,498.07 : 63,743.05 = 12,916.16 : x
2. Step 2: Convert to fraction form
   42,498.07/63,743.05 = 12,916.16/x
3. Step 3: Cross multiply
   42,498.07x = 63,743.05 × 12,916.16
4. Step 4: Simplify right side
   42,498.07x = 823,315,369.15
5. Step 5: Solve for x
   x = 823,315,369.15/42,498.07
6. Step 6: Final answer
   x = 19,373.01