Finding the Fourth Proportional to 42,061.68, 63,085.84 and 13,979.39

Step by Step Solution

1. Step 1: Write the proportion equation
   42,061.68 : 63,085.84 = 13,979.39 : x
2. Step 2: Convert to fraction form
   42,061.68/63,085.84 = 13,979.39/x
3. Step 3: Cross multiply
   42,061.68x = 63,085.84 × 13,979.39
4. Step 4: Simplify right side
   42,061.68x = 881,901,210.46
5. Step 5: Solve for x
   x = 881,901,210.46/42,061.68
6. Step 6: Final answer
   x = 20,966.86