Finding the Fourth Proportional to 101,338.07, 139,953.98 and 77,091.12

Step by Step Solution

1. Step 1: Write the proportion equation
   101,338.07 : 139,953.98 = 77,091.12 : x
2. Step 2: Convert to fraction form
   101,338.07/139,953.98 = 77,091.12/x
3. Step 3: Cross multiply
   101,338.07x = 139,953.98 × 77,091.12
4. Step 4: Simplify right side
   101,338.07x = 10,789,208,681.20
5. Step 5: Solve for x
   x = 10,789,208,681.20/101,338.07
6. Step 6: Final answer
   x = 106,467.48