Finding the Fourth Proportional to 111,683.91, 154,124.30 and 61,386.15

Step by Step Solution

1. Step 1: Write the proportion equation
   111,683.91 : 154,124.30 = 61,386.15 : x
2. Step 2: Convert to fraction form
   111,683.91/154,124.30 = 61,386.15/x
3. Step 3: Cross multiply
   111,683.91x = 154,124.30 × 61,386.15
4. Step 4: Simplify right side
   111,683.91x = 9,461,097,091.51
5. Step 5: Solve for x
   x = 9,461,097,091.51/111,683.91
6. Step 6: Final answer
   x = 84,713.16