Finding the Fourth Proportional to 99,629.39, 137,483.55 and 56,603.25

Step by Step Solution

1. Step 1: Write the proportion equation
   99,629.39 : 137,483.55 = 56,603.25 : x
2. Step 2: Convert to fraction form
   99,629.39/137,483.55 = 56,603.25/x
3. Step 3: Cross multiply
   99,629.39x = 137,483.55 × 56,603.25
4. Step 4: Simplify right side
   99,629.39x = 7,782,015,751.54
5. Step 5: Solve for x
   x = 7,782,015,751.54/99,629.39
6. Step 6: Final answer
   x = 78,109.64