Finding the Fourth Proportional to 99,993.69, 138,026.04 and 57,569.13

Step by Step Solution

1. Step 1: Write the proportion equation
   99,993.69 : 138,026.04 = 57,569.13 : x
2. Step 2: Convert to fraction form
   99,993.69/138,026.04 = 57,569.13/x
3. Step 3: Cross multiply
   99,993.69x = 138,026.04 × 57,569.13
4. Step 4: Simplify right side
   99,993.69x = 7,946,039,040.15
5. Step 5: Solve for x
   x = 7,946,039,040.15/99,993.69
6. Step 6: Final answer
   x = 79,465.40