Finding the Fourth Proportional to 42,268.98, 63,404.62 and 12,686.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,268.98 : 63,404.62 = 12,686.81 : x
2. Step 2: Convert to fraction form
   42,268.98/63,404.62 = 12,686.81/x
3. Step 3: Cross multiply
   42,268.98x = 63,404.62 × 12,686.81
4. Step 4: Simplify right side
   42,268.98x = 804,402,303.63
5. Step 5: Solve for x
   x = 804,402,303.63/42,268.98
6. Step 6: Final answer
   x = 19,030.56