Finding the Fourth Proportional to 32,931.56, 45,433.15 and 21,607.31

Step by Step Solution

1. Step 1: Write the proportion equation
   32,931.56 : 45,433.15 = 21,607.31 : x
2. Step 2: Convert to fraction form
   32,931.56/45,433.15 = 21,607.31/x
3. Step 3: Cross multiply
   32,931.56x = 45,433.15 × 21,607.31
4. Step 4: Simplify right side
   32,931.56x = 981,688,081.87
5. Step 5: Solve for x
   x = 981,688,081.87/32,931.56
6. Step 6: Final answer
   x = 29,809.95