Finding the Fourth Proportional to 21,970.78, 32,978.04 and 12,114.70

Step by Step Solution

1. Step 1: Write the proportion equation
   21,970.78 : 32,978.04 = 12,114.70 : x
2. Step 2: Convert to fraction form
   21,970.78/32,978.04 = 12,114.70/x
3. Step 3: Cross multiply
   21,970.78x = 32,978.04 × 12,114.70
4. Step 4: Simplify right side
   21,970.78x = 399,519,061.19
5. Step 5: Solve for x
   x = 399,519,061.19/21,970.78
6. Step 6: Final answer
   x = 18,184.11