Finding the Fourth Proportional to 101,019.51, 139,407.90 and 55,699.29

Step by Step Solution

1. Step 1: Write the proportion equation
   101,019.51 : 139,407.90 = 55,699.29 : x
2. Step 2: Convert to fraction form
   101,019.51/139,407.90 = 55,699.29/x
3. Step 3: Cross multiply
   101,019.51x = 139,407.90 × 55,699.29
4. Step 4: Simplify right side
   101,019.51x = 7,764,921,050.39
5. Step 5: Solve for x
   x = 7,764,921,050.39/101,019.51
6. Step 6: Final answer
   x = 76,865.56