Finding the Fourth Proportional to 103,444, 142,752.72 and 56,340

Step by Step Solution

1. Step 1: Write the proportion equation
   103,444 : 142,752.72 = 56,340 : x
2. Step 2: Convert to fraction form
   103,444/142,752.72 = 56,340/x
3. Step 3: Cross multiply
   103,444x = 142,752.72 × 56,340
4. Step 4: Simplify right side
   103,444x = 8,042,688,244.80
5. Step 5: Solve for x
   x = 8,042,688,244.80/103,444
6. Step 6: Final answer
   x = 77,749.20