Finding the Fourth Proportional to 99,904.89, 137,872.89 and 57,463.47

Step by Step Solution

1. Step 1: Write the proportion equation
   99,904.89 : 137,872.89 = 57,463.47 : x
2. Step 2: Convert to fraction form
   99,904.89/137,872.89 = 57,463.47/x
3. Step 3: Cross multiply
   99,904.89x = 137,872.89 × 57,463.47
4. Step 4: Simplify right side
   99,904.89x = 7,922,654,678.33
5. Step 5: Solve for x
   x = 7,922,654,678.33/99,904.89
6. Step 6: Final answer
   x = 79,301.97