Finding the Fourth Proportional to 101,051.91, 139,448.37 and 55,731.81

Step by Step Solution

1. Step 1: Write the proportion equation
   101,051.91 : 139,448.37 = 55,731.81 : x
2. Step 2: Convert to fraction form
   101,051.91/139,448.37 = 55,731.81/x
3. Step 3: Cross multiply
   101,051.91x = 139,448.37 × 55,731.81
4. Step 4: Simplify right side
   101,051.91x = 7,771,710,061.65
5. Step 5: Solve for x
   x = 7,771,710,061.65/101,051.91
6. Step 6: Final answer
   x = 76,908.10