Finding the Fourth Proportional to 42,069.25, 63,090.16 and 13,981.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,069.25 : 63,090.16 = 13,981.75 : x
2. Step 2: Convert to fraction form
   42,069.25/63,090.16 = 13,981.75/x
3. Step 3: Cross multiply
   42,069.25x = 63,090.16 × 13,981.75
4. Step 4: Simplify right side
   42,069.25x = 882,111,002.31
5. Step 5: Solve for x
   x = 882,111,002.31/42,069.25
6. Step 6: Final answer
   x = 20,968.07