Finding the Fourth Proportional to 99,019.80, 136,627.56 and 56,569.32

Step by Step Solution

1. Step 1: Write the proportion equation
   99,019.80 : 136,627.56 = 56,569.32 : x
2. Step 2: Convert to fraction form
   99,019.80/136,627.56 = 56,569.32/x
3. Step 3: Cross multiply
   99,019.80x = 136,627.56 × 56,569.32
4. Step 4: Simplify right side
   99,019.80x = 7,728,928,162.46
5. Step 5: Solve for x
   x = 7,728,928,162.46/99,019.80
6. Step 6: Final answer
   x = 78,054.37