Finding the Fourth Proportional to 99,016.10, 136,649.46 and 56,573.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,016.10 : 136,649.46 = 56,573.72 : x
2. Step 2: Convert to fraction form
   99,016.10/136,649.46 = 56,573.72/x
3. Step 3: Cross multiply
   99,016.10x = 136,649.46 × 56,573.72
4. Step 4: Simplify right side
   99,016.10x = 7,730,768,288.19
5. Step 5: Solve for x
   x = 7,730,768,288.19/99,016.10
6. Step 6: Final answer
   x = 78,075.87