Finding the Fourth Proportional to 111,869.57, 154,386.89 and 64,130.09

Step by Step Solution

1. Step 1: Write the proportion equation
   111,869.57 : 154,386.89 = 64,130.09 : x
2. Step 2: Convert to fraction form
   111,869.57/154,386.89 = 64,130.09/x
3. Step 3: Cross multiply
   111,869.57x = 154,386.89 × 64,130.09
4. Step 4: Simplify right side
   111,869.57x = 9,900,844,877.37
5. Step 5: Solve for x
   x = 9,900,844,877.37/111,869.57
6. Step 6: Final answer
   x = 88,503.47