Finding the Fourth Proportional to 32,878.72, 45,459.12 and 31,409.92

Step by Step Solution

1. Step 1: Write the proportion equation
   32,878.72 : 45,459.12 = 31,409.92 : x
2. Step 2: Convert to fraction form
   32,878.72/45,459.12 = 31,409.92/x
3. Step 3: Cross multiply
   32,878.72x = 45,459.12 × 31,409.92
4. Step 4: Simplify right side
   32,878.72x = 1,427,867,322.47
5. Step 5: Solve for x
   x = 1,427,867,322.47/32,878.72
6. Step 6: Final answer
   x = 43,428.31