Finding the Fourth Proportional to 112,415.52, 155,132.64 and 64,678.08

Step by Step Solution

1. Step 1: Write the proportion equation
   112,415.52 : 155,132.64 = 64,678.08 : x
2. Step 2: Convert to fraction form
   112,415.52/155,132.64 = 64,678.08/x
3. Step 3: Cross multiply
   112,415.52x = 155,132.64 × 64,678.08
4. Step 4: Simplify right side
   112,415.52x = 10,033,681,300.53
5. Step 5: Solve for x
   x = 10,033,681,300.53/112,415.52
6. Step 6: Final answer
   x = 89,255.30