Finding the Fourth Proportional to 42,066.16, 63,085.59 and 13,978.67

Step by Step Solution

1. Step 1: Write the proportion equation
   42,066.16 : 63,085.59 = 13,978.67 : x
2. Step 2: Convert to fraction form
   42,066.16/63,085.59 = 13,978.67/x
3. Step 3: Cross multiply
   42,066.16x = 63,085.59 × 13,978.67
4. Step 4: Simplify right side
   42,066.16x = 881,852,328.94
5. Step 5: Solve for x
   x = 881,852,328.94/42,066.16
6. Step 6: Final answer
   x = 20,963.46