Finding the Fourth Proportional to 99,010.10, 136,641.18 and 56,567.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,010.10 : 136,641.18 = 56,567.72 : x
2. Step 2: Convert to fraction form
   99,010.10/136,641.18 = 56,567.72/x
3. Step 3: Cross multiply
   99,010.10x = 136,641.18 × 56,567.72
4. Step 4: Simplify right side
   99,010.10x = 7,729,480,010.71
5. Step 5: Solve for x
   x = 7,729,480,010.71/99,010.10
6. Step 6: Final answer
   x = 78,067.59