Finding the Fourth Proportional to 113,279, 156,325.20 and 62,978

Step by Step Solution

1. Step 1: Write the proportion equation
   113,279 : 156,325.20 = 62,978 : x
2. Step 2: Convert to fraction form
   113,279/156,325.20 = 62,978/x
3. Step 3: Cross multiply
   113,279x = 156,325.20 × 62,978
4. Step 4: Simplify right side
   113,279x = 9,845,048,445.60
5. Step 5: Solve for x
   x = 9,845,048,445.60/113,279
6. Step 6: Final answer
   x = 86,909.74