Finding the Fourth Proportional to 42,063.36, 63,106.38 and 13,987.98

Step by Step Solution

1. Step 1: Write the proportion equation
   42,063.36 : 63,106.38 = 13,987.98 : x
2. Step 2: Convert to fraction form
   42,063.36/63,106.38 = 13,987.98/x
3. Step 3: Cross multiply
   42,063.36x = 63,106.38 × 13,987.98
4. Step 4: Simplify right side
   42,063.36x = 882,730,781.31
5. Step 5: Solve for x
   x = 882,730,781.31/42,063.36
6. Step 6: Final answer
   x = 20,985.74