Finding the Fourth Proportional to 72,455, 99,988.18 and 42,261.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,455 : 99,988.18 = 42,261.18 : x
2. Step 2: Convert to fraction form
   72,455/99,988.18 = 42,261.18/x
3. Step 3: Cross multiply
   72,455x = 99,988.18 × 42,261.18
4. Step 4: Simplify right side
   72,455x = 4,225,618,472.85
5. Step 5: Solve for x
   x = 4,225,618,472.85/72,455
6. Step 6: Final answer
   x = 58,320.59