Finding the Fourth Proportional to 99,901.89, 137,868.75 and 57,460.46

Step by Step Solution

1. Step 1: Write the proportion equation
   99,901.89 : 137,868.75 = 57,460.46 : x
2. Step 2: Convert to fraction form
   99,901.89/137,868.75 = 57,460.46/x
3. Step 3: Cross multiply
   99,901.89x = 137,868.75 × 57,460.46
4. Step 4: Simplify right side
   99,901.89x = 7,922,001,105.28
5. Step 5: Solve for x
   x = 7,922,001,105.28/99,901.89
6. Step 6: Final answer
   x = 79,297.81