Finding the Fourth Proportional to 99,722.12, 137,667.32 and 77,010.12

Step by Step Solution

1. Step 1: Write the proportion equation
   99,722.12 : 137,667.32 = 77,010.12 : x
2. Step 2: Convert to fraction form
   99,722.12/137,667.32 = 77,010.12/x
3. Step 3: Cross multiply
   99,722.12x = 137,667.32 × 77,010.12
4. Step 4: Simplify right side
   99,722.12x = 10,601,776,448.23
5. Step 5: Solve for x
   x = 10,601,776,448.23/99,722.12
6. Step 6: Final answer
   x = 106,313.19