Finding the Fourth Proportional to 111,218.84, 153,551.72 and 85,677.12

Step by Step Solution

1. Step 1: Write the proportion equation
   111,218.84 : 153,551.72 = 85,677.12 : x
2. Step 2: Convert to fraction form
   111,218.84/153,551.72 = 85,677.12/x
3. Step 3: Cross multiply
   111,218.84x = 153,551.72 × 85,677.12
4. Step 4: Simplify right side
   111,218.84x = 13,155,869,140.65
5. Step 5: Solve for x
   x = 13,155,869,140.65/111,218.84
6. Step 6: Final answer
   x = 118,288.13