Finding the Fourth Proportional to 72,416.58, 99,934.62 and 42,219.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,416.58 : 99,934.62 = 42,219.78 : x
2. Step 2: Convert to fraction form
   72,416.58/99,934.62 = 42,219.78/x
3. Step 3: Cross multiply
   72,416.58x = 99,934.62 × 42,219.78
4. Step 4: Simplify right side
   72,416.58x = 4,219,217,670.78
5. Step 5: Solve for x
   x = 4,219,217,670.78/72,416.58
6. Step 6: Final answer
   x = 58,263.14