Finding the Fourth Proportional to 99,667.68, 137,536.65 and 56,646.04

Step by Step Solution

1. Step 1: Write the proportion equation
   99,667.68 : 137,536.65 = 56,646.04 : x
2. Step 2: Convert to fraction form
   99,667.68/137,536.65 = 56,646.04/x
3. Step 3: Cross multiply
   99,667.68x = 137,536.65 × 56,646.04
4. Step 4: Simplify right side
   99,667.68x = 7,790,906,577.37
5. Step 5: Solve for x
   x = 7,790,906,577.37/99,667.68
6. Step 6: Final answer
   x = 78,168.84