Finding the Fourth Proportional to 111,020.72, 153,209.52 and 61,294.63

Step by Step Solution

1. Step 1: Write the proportion equation
   111,020.72 : 153,209.52 = 61,294.63 : x
2. Step 2: Convert to fraction form
   111,020.72/153,209.52 = 61,294.63/x
3. Step 3: Cross multiply
   111,020.72x = 153,209.52 × 61,294.63
4. Step 4: Simplify right side
   111,020.72x = 9,390,920,582.51
5. Step 5: Solve for x
   x = 9,390,920,582.51/111,020.72
6. Step 6: Final answer
   x = 84,587.10