Finding the Fourth Proportional to 42,972, 64,460.16 and 15,272.16

Step by Step Solution

1. Step 1: Write the proportion equation
   42,972 : 64,460.16 = 15,272.16 : x
2. Step 2: Convert to fraction form
   42,972/64,460.16 = 15,272.16/x
3. Step 3: Cross multiply
   42,972x = 64,460.16 × 15,272.16
4. Step 4: Simplify right side
   42,972x = 984,445,877.15
5. Step 5: Solve for x
   x = 984,445,877.15/42,972
6. Step 6: Final answer
   x = 22,909.01