Finding the Fourth Proportional to 42,773.36, 64,143.60 and 14,688.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,773.36 : 64,143.60 = 14,688.16 : x
2. Step 2: Convert to fraction form
   42,773.36/64,143.60 = 14,688.16/x
3. Step 3: Cross multiply
   42,773.36x = 64,143.60 × 14,688.16
4. Step 4: Simplify right side
   42,773.36x = 942,151,459.78
5. Step 5: Solve for x
   x = 942,151,459.78/42,773.36
6. Step 6: Final answer
   x = 22,026.59