Finding the Fourth Proportional to 42,430.05, 63,598.59 and 21,336.44

Step by Step Solution

1. Step 1: Write the proportion equation
   42,430.05 : 63,598.59 = 21,336.44 : x
2. Step 2: Convert to fraction form
   42,430.05/63,598.59 = 21,336.44/x
3. Step 3: Cross multiply
   42,430.05x = 63,598.59 × 21,336.44
4. Step 4: Simplify right side
   42,430.05x = 1,356,967,181.63
5. Step 5: Solve for x
   x = 1,356,967,181.63/42,430.05
6. Step 6: Final answer
   x = 31,981.28