Finding the Fourth Proportional to 42,991.63, 64,522.98 and 21,947.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42,991.63 : 64,522.98 = 21,947.22 : x
2. Step 2: Convert to fraction form
   42,991.63/64,522.98 = 21,947.22/x
3. Step 3: Cross multiply
   42,991.63x = 64,522.98 × 21,947.22
4. Step 4: Simplify right side
   42,991.63x = 1,416,100,037.12
5. Step 5: Solve for x
   x = 1,416,100,037.12/42,991.63
6. Step 6: Final answer
   x = 32,938.97