Finding the Fourth Proportional to 99,885.39, 137,845.94 and 57,443.91

Step by Step Solution

1. Step 1: Write the proportion equation
   99,885.39 : 137,845.94 = 57,443.91 : x
2. Step 2: Convert to fraction form
   99,885.39/137,845.94 = 57,443.91/x
3. Step 3: Cross multiply
   99,885.39x = 137,845.94 × 57,443.91
4. Step 4: Simplify right side
   99,885.39x = 7,918,409,484.01
5. Step 5: Solve for x
   x = 7,918,409,484.01/99,885.39
6. Step 6: Final answer
   x = 79,274.95