Finding the Fourth Proportional to 111,861.36, 154,368.72 and 61,560

Step by Step Solution

1. Step 1: Write the proportion equation
   111,861.36 : 154,368.72 = 61,560 : x
2. Step 2: Convert to fraction form
   111,861.36/154,368.72 = 61,560/x
3. Step 3: Cross multiply
   111,861.36x = 154,368.72 × 61,560
4. Step 4: Simplify right side
   111,861.36x = 9,502,938,403.20
5. Step 5: Solve for x
   x = 9,502,938,403.20/111,861.36
6. Step 6: Final answer
   x = 84,952.82