Finding the Fourth Proportional to 101,802.77, 140,504.69 and 56,495.31

Step by Step Solution

1. Step 1: Write the proportion equation
   101,802.77 : 140,504.69 = 56,495.31 : x
2. Step 2: Convert to fraction form
   101,802.77/140,504.69 = 56,495.31/x
3. Step 3: Cross multiply
   101,802.77x = 140,504.69 × 56,495.31
4. Step 4: Simplify right side
   101,802.77x = 7,937,856,018.00
5. Step 5: Solve for x
   x = 7,937,856,018.00/101,802.77
6. Step 6: Final answer
   x = 77,972.89