Finding the Fourth Proportional to 99,667.77, 137,536.48 and 56,646.14

Step by Step Solution

1. Step 1: Write the proportion equation
   99,667.77 : 137,536.48 = 56,646.14 : x
2. Step 2: Convert to fraction form
   99,667.77/137,536.48 = 56,646.14/x
3. Step 3: Cross multiply
   99,667.77x = 137,536.48 × 56,646.14
4. Step 4: Simplify right side
   99,667.77x = 7,790,910,084.31
5. Step 5: Solve for x
   x = 7,790,910,084.31/99,667.77
6. Step 6: Final answer
   x = 78,168.80