Finding the Fourth Proportional to 99,010.60, 136,641.86 and 56,568.22

Step by Step Solution

1. Step 1: Write the proportion equation
   99,010.60 : 136,641.86 = 56,568.22 : x
2. Step 2: Convert to fraction form
   99,010.60/136,641.86 = 56,568.22/x
3. Step 3: Cross multiply
   99,010.60x = 136,641.86 × 56,568.22
4. Step 4: Simplify right side
   99,010.60x = 7,729,586,797.69
5. Step 5: Solve for x
   x = 7,729,586,797.69/99,010.60
6. Step 6: Final answer
   x = 78,068.28