Finding the Fourth Proportional to 100,892.32, 139,224.72 and 58,443.28

Step by Step Solution

1. Step 1: Write the proportion equation
   100,892.32 : 139,224.72 = 58,443.28 : x
2. Step 2: Convert to fraction form
   100,892.32/139,224.72 = 58,443.28/x
3. Step 3: Cross multiply
   100,892.32x = 139,224.72 × 58,443.28
4. Step 4: Simplify right side
   100,892.32x = 8,136,749,293.88
5. Step 5: Solve for x
   x = 8,136,749,293.88/100,892.32
6. Step 6: Final answer
   x = 80,647.86