Finding the Fourth Proportional to 72,393.84, 99,895.43 and 42,172.84

Step by Step Solution

1. Step 1: Write the proportion equation
   72,393.84 : 99,895.43 = 42,172.84 : x
2. Step 2: Convert to fraction form
   72,393.84/99,895.43 = 42,172.84/x
3. Step 3: Cross multiply
   72,393.84x = 99,895.43 × 42,172.84
4. Step 4: Simplify right side
   72,393.84x = 4,212,873,841.81
5. Step 5: Solve for x
   x = 4,212,873,841.81/72,393.84
6. Step 6: Final answer
   x = 58,193.82