Finding the Fourth Proportional to 70,978.59, 106,246.42 and 52,279.74

Step by Step Solution

1. Step 1: Write the proportion equation
   70,978.59 : 106,246.42 = 52,279.74 : x
2. Step 2: Convert to fraction form
   70,978.59/106,246.42 = 52,279.74/x
3. Step 3: Cross multiply
   70,978.59x = 106,246.42 × 52,279.74
4. Step 4: Simplify right side
   70,978.59x = 5,554,535,213.53
5. Step 5: Solve for x
   x = 5,554,535,213.53/70,978.59
6. Step 6: Final answer
   x = 78,256.49