Finding the Fourth Proportional to 60,722.32, 91,065.72 and 21,272.08

Step by Step Solution

1. Step 1: Write the proportion equation
   60,722.32 : 91,065.72 = 21,272.08 : x
2. Step 2: Convert to fraction form
   60,722.32/91,065.72 = 21,272.08/x
3. Step 3: Cross multiply
   60,722.32x = 91,065.72 × 21,272.08
4. Step 4: Simplify right side
   60,722.32x = 1,937,157,281.10
5. Step 5: Solve for x
   x = 1,937,157,281.10/60,722.32
6. Step 6: Final answer
   x = 31,901.90