Finding the Fourth Proportional to 111,312, 153,610.56 and 61,011.20

Step by Step Solution

1. Step 1: Write the proportion equation
   111,312 : 153,610.56 = 61,011.20 : x
2. Step 2: Convert to fraction form
   111,312/153,610.56 = 61,011.20/x
3. Step 3: Cross multiply
   111,312x = 153,610.56 × 61,011.20
4. Step 4: Simplify right side
   111,312x = 9,371,964,598.27
5. Step 5: Solve for x
   x = 9,371,964,598.27/111,312
6. Step 6: Final answer
   x = 84,195.46