Finding the Fourth Proportional to 72,434.28, 99,971.76 and 42,237.32

Step by Step Solution

1. Step 1: Write the proportion equation
   72,434.28 : 99,971.76 = 42,237.32 : x
2. Step 2: Convert to fraction form
   72,434.28/99,971.76 = 42,237.32/x
3. Step 3: Cross multiply
   72,434.28x = 99,971.76 × 42,237.32
4. Step 4: Simplify right side
   72,434.28x = 4,222,539,218.08
5. Step 5: Solve for x
   x = 4,222,539,218.08/72,434.28
6. Step 6: Final answer
   x = 58,294.76