Finding the Fourth Proportional to 42,880.17, 64,359.48 and 21,834.75

Step by Step Solution

1. Step 1: Write the proportion equation
   42,880.17 : 64,359.48 = 21,834.75 : x
2. Step 2: Convert to fraction form
   42,880.17/64,359.48 = 21,834.75/x
3. Step 3: Cross multiply
   42,880.17x = 64,359.48 × 21,834.75
4. Step 4: Simplify right side
   42,880.17x = 1,405,273,155.93
5. Step 5: Solve for x
   x = 1,405,273,155.93/42,880.17
6. Step 6: Final answer
   x = 32,772.10