Finding the Fourth Proportional to 68,090.72, 102,152.49 and 21,343.60

Step by Step Solution

1. Step 1: Write the proportion equation
   68,090.72 : 102,152.49 = 21,343.60 : x
2. Step 2: Convert to fraction form
   68,090.72/102,152.49 = 21,343.60/x
3. Step 3: Cross multiply
   68,090.72x = 102,152.49 × 21,343.60
4. Step 4: Simplify right side
   68,090.72x = 2,180,301,885.56
5. Step 5: Solve for x
   x = 2,180,301,885.56/68,090.72
6. Step 6: Final answer
   x = 32,020.54