Finding the Fourth Proportional to 42,997.50, 64,503.63 and 13,414.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,997.50 : 64,503.63 = 13,414.32 : x
2. Step 2: Convert to fraction form
   42,997.50/64,503.63 = 13,414.32/x
3. Step 3: Cross multiply
   42,997.50x = 64,503.63 × 13,414.32
4. Step 4: Simplify right side
   42,997.50x = 865,272,333.98
5. Step 5: Solve for x
   x = 865,272,333.98/42,997.50
6. Step 6: Final answer
   x = 20,123.78