Finding the Fourth Proportional to 101,821.52, 140,513.24 and 56,499.39

Step by Step Solution

1. Step 1: Write the proportion equation
   101,821.52 : 140,513.24 = 56,499.39 : x
2. Step 2: Convert to fraction form
   101,821.52/140,513.24 = 56,499.39/x
3. Step 3: Cross multiply
   101,821.52x = 140,513.24 × 56,499.39
4. Step 4: Simplify right side
   101,821.52x = 7,938,912,488.17
5. Step 5: Solve for x
   x = 7,938,912,488.17/101,821.52
6. Step 6: Final answer
   x = 77,968.90