Finding the Fourth Proportional to 31,056.64, 42,856.84 and 16,909.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,056.64 : 42,856.84 = 16,909.52 : x
2. Step 2: Convert to fraction form
   31,056.64/42,856.84 = 16,909.52/x
3. Step 3: Cross multiply
   31,056.64x = 42,856.84 × 16,909.52
4. Step 4: Simplify right side
   31,056.64x = 724,688,593.12
5. Step 5: Solve for x
   x = 724,688,593.12/31,056.64
6. Step 6: Final answer
   x = 23,334.42