Finding the Fourth Proportional to 101,801.77, 140,503.31 and 56,494.31

Step by Step Solution

1. Step 1: Write the proportion equation
   101,801.77 : 140,503.31 = 56,494.31 : x
2. Step 2: Convert to fraction form
   101,801.77/140,503.31 = 56,494.31/x
3. Step 3: Cross multiply
   101,801.77x = 140,503.31 × 56,494.31
4. Step 4: Simplify right side
   101,801.77x = 7,937,636,566.18
5. Step 5: Solve for x
   x = 7,937,636,566.18/101,801.77
6. Step 6: Final answer
   x = 77,971.50