Finding the Fourth Proportional to 45,664.32, 68,388.72 and 31,572

Step by Step Solution

1. Step 1: Write the proportion equation
   45,664.32 : 68,388.72 = 31,572 : x
2. Step 2: Convert to fraction form
   45,664.32/68,388.72 = 31,572/x
3. Step 3: Cross multiply
   45,664.32x = 68,388.72 × 31,572
4. Step 4: Simplify right side
   45,664.32x = 2,159,168,667.84
5. Step 5: Solve for x
   x = 2,159,168,667.84/45,664.32
6. Step 6: Final answer
   x = 47,283.50