Finding the Fourth Proportional to 113,539.08, 156,667.86 and 64,479

Step by Step Solution

1. Step 1: Write the proportion equation
   113,539.08 : 156,667.86 = 64,479 : x
2. Step 2: Convert to fraction form
   113,539.08/156,667.86 = 64,479/x
3. Step 3: Cross multiply
   113,539.08x = 156,667.86 × 64,479
4. Step 4: Simplify right side
   113,539.08x = 10,101,786,944.94
5. Step 5: Solve for x
   x = 10,101,786,944.94/113,539.08
6. Step 6: Final answer
   x = 88,971.89