Finding the Fourth Proportional to 112,670.15, 155,482.52 and 64,920.65

Step by Step Solution

1. Step 1: Write the proportion equation
   112,670.15 : 155,482.52 = 64,920.65 : x
2. Step 2: Convert to fraction form
   112,670.15/155,482.52 = 64,920.65/x
3. Step 3: Cross multiply
   112,670.15x = 155,482.52 × 64,920.65
4. Step 4: Simplify right side
   112,670.15x = 10,094,026,813.05
5. Step 5: Solve for x
   x = 10,094,026,813.05/112,670.15
6. Step 6: Final answer
   x = 89,589.18