Finding the Fourth Proportional to 39,435.60, 59,195.52 and 21,900.72

Step by Step Solution

1. Step 1: Write the proportion equation
   39,435.60 : 59,195.52 = 21,900.72 : x
2. Step 2: Convert to fraction form
   39,435.60/59,195.52 = 21,900.72/x
3. Step 3: Cross multiply
   39,435.60x = 59,195.52 × 21,900.72
4. Step 4: Simplify right side
   39,435.60x = 1,296,424,508.77
5. Step 5: Solve for x
   x = 1,296,424,508.77/39,435.60
6. Step 6: Final answer
   x = 32,874.47