Finding the Fourth Proportional to 111,471.72, 153,900.72 and 77,470.08

Step by Step Solution

1. Step 1: Write the proportion equation
   111,471.72 : 153,900.72 = 77,470.08 : x
2. Step 2: Convert to fraction form
   111,471.72/153,900.72 = 77,470.08/x
3. Step 3: Cross multiply
   111,471.72x = 153,900.72 × 77,470.08
4. Step 4: Simplify right side
   111,471.72x = 11,922,701,090.46
5. Step 5: Solve for x
   x = 11,922,701,090.46/111,471.72
6. Step 6: Final answer
   x = 106,957.18