Finding the Fourth Proportional to 101,215.02, 139,673.93 and 55,892.15

Step by Step Solution

1. Step 1: Write the proportion equation
   101,215.02 : 139,673.93 = 55,892.15 : x
2. Step 2: Convert to fraction form
   101,215.02/139,673.93 = 55,892.15/x
3. Step 3: Cross multiply
   101,215.02x = 139,673.93 × 55,892.15
4. Step 4: Simplify right side
   101,215.02x = 7,806,675,268.82
5. Step 5: Solve for x
   x = 7,806,675,268.82/101,215.02
6. Step 6: Final answer
   x = 77,129.61