Finding the Fourth Proportional to 42,531.09, 63,805.86 and 12,948.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,531.09 : 63,805.86 = 12,948.16 : x
2. Step 2: Convert to fraction form
   42,531.09/63,805.86 = 12,948.16/x
3. Step 3: Cross multiply
   42,531.09x = 63,805.86 × 12,948.16
4. Step 4: Simplify right side
   42,531.09x = 826,168,484.22
5. Step 5: Solve for x
   x = 826,168,484.22/42,531.09
6. Step 6: Final answer
   x = 19,425.05