Finding the Fourth Proportional to 101,161.31, 139,602.61 and 55,839.30

Step by Step Solution

1. Step 1: Write the proportion equation
   101,161.31 : 139,602.61 = 55,839.30 : x
2. Step 2: Convert to fraction form
   101,161.31/139,602.61 = 55,839.30/x
3. Step 3: Cross multiply
   101,161.31x = 139,602.61 × 55,839.30
4. Step 4: Simplify right side
   101,161.31x = 7,795,312,264.88
5. Step 5: Solve for x
   x = 7,795,312,264.88/101,161.31
6. Step 6: Final answer
   x = 77,058.24