Finding the Fourth Proportional to 101,321.31, 139,823.64 and 55,998.30

Step by Step Solution

1. Step 1: Write the proportion equation
   101,321.31 : 139,823.64 = 55,998.30 : x
2. Step 2: Convert to fraction form
   101,321.31/139,823.64 = 55,998.30/x
3. Step 3: Cross multiply
   101,321.31x = 139,823.64 × 55,998.30
4. Step 4: Simplify right side
   101,321.31x = 7,829,886,139.81
5. Step 5: Solve for x
   x = 7,829,886,139.81/101,321.31
6. Step 6: Final answer
   x = 77,277.78