Finding the Fourth Proportional to 72,014.86, 99,427.31 and 64,448.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,014.86 : 99,427.31 = 64,448.18 : x
2. Step 2: Convert to fraction form
   72,014.86/99,427.31 = 64,448.18/x
3. Step 3: Cross multiply
   72,014.86x = 99,427.31 × 64,448.18
4. Step 4: Simplify right side
   72,014.86x = 6,407,909,147.90
5. Step 5: Solve for x
   x = 6,407,909,147.90/72,014.86
6. Step 6: Final answer
   x = 88,980.38