Finding the Fourth Proportional to 101,300.40, 139,793.94 and 55,980.09

Step by Step Solution

1. Step 1: Write the proportion equation
   101,300.40 : 139,793.94 = 55,980.09 : x
2. Step 2: Convert to fraction form
   101,300.40/139,793.94 = 55,980.09/x
3. Step 3: Cross multiply
   101,300.40x = 139,793.94 × 55,980.09
4. Step 4: Simplify right side
   101,300.40x = 7,825,677,342.65
5. Step 5: Solve for x
   x = 7,825,677,342.65/101,300.40
6. Step 6: Final answer
   x = 77,252.19