Finding the Fourth Proportional to 112,572.84, 155,337.30 and 64,828.20

Step by Step Solution

1. Step 1: Write the proportion equation
   112,572.84 : 155,337.30 = 64,828.20 : x
2. Step 2: Convert to fraction form
   112,572.84/155,337.30 = 64,828.20/x
3. Step 3: Cross multiply
   112,572.84x = 155,337.30 × 64,828.20
4. Step 4: Simplify right side
   112,572.84x = 10,070,237,551.86
5. Step 5: Solve for x
   x = 10,070,237,551.86/112,572.84
6. Step 6: Final answer
   x = 89,455.30