Finding the Fourth Proportional to 98,564.31, 136,020.06 and 56,123.01

Step by Step Solution

1. Step 1: Write the proportion equation
   98,564.31 : 136,020.06 = 56,123.01 : x
2. Step 2: Convert to fraction form
   98,564.31/136,020.06 = 56,123.01/x
3. Step 3: Cross multiply
   98,564.31x = 136,020.06 × 56,123.01
4. Step 4: Simplify right side
   98,564.31x = 7,633,855,187.58
5. Step 5: Solve for x
   x = 7,633,855,187.58/98,564.31
6. Step 6: Final answer
   x = 77,450.50