Finding the Fourth Proportional to 98,559.56, 136,036.50 and 56,143.10

Step by Step Solution

1. Step 1: Write the proportion equation
   98,559.56 : 136,036.50 = 56,143.10 : x
2. Step 2: Convert to fraction form
   98,559.56/136,036.50 = 56,143.10/x
3. Step 3: Cross multiply
   98,559.56x = 136,036.50 × 56,143.10
4. Step 4: Simplify right side
   98,559.56x = 7,637,510,952.70
5. Step 5: Solve for x
   x = 7,637,510,952.70/98,559.56
6. Step 6: Final answer
   x = 77,491.32