Finding the Fourth Proportional to 99,106.16, 136,761.72 and 56,669.36

Step by Step Solution

1. Step 1: Write the proportion equation
   99,106.16 : 136,761.72 = 56,669.36 : x
2. Step 2: Convert to fraction form
   99,106.16/136,761.72 = 56,669.36/x
3. Step 3: Cross multiply
   99,106.16x = 136,761.72 × 56,669.36
4. Step 4: Simplify right side
   99,106.16x = 7,750,199,144.90
5. Step 5: Solve for x
   x = 7,750,199,144.90/99,106.16
6. Step 6: Final answer
   x = 78,200.98