Finding the Fourth Proportional to 42,880.55, 64,360.37 and 21,835.76

Step by Step Solution

1. Step 1: Write the proportion equation
   42,880.55 : 64,360.37 = 21,835.76 : x
2. Step 2: Convert to fraction form
   42,880.55/64,360.37 = 21,835.76/x
3. Step 3: Cross multiply
   42,880.55x = 64,360.37 × 21,835.76
4. Step 4: Simplify right side
   42,880.55x = 1,405,357,325.62
5. Step 5: Solve for x
   x = 1,405,357,325.62/42,880.55
6. Step 6: Final answer
   x = 32,773.77