Finding the Fourth Proportional to 112,380.52, 155,089.82 and 64,633.90

Step by Step Solution

1. Step 1: Write the proportion equation
   112,380.52 : 155,089.82 = 64,633.90 : x
2. Step 2: Convert to fraction form
   112,380.52/155,089.82 = 64,633.90/x
3. Step 3: Cross multiply
   112,380.52x = 155,089.82 × 64,633.90
4. Step 4: Simplify right side
   112,380.52x = 10,024,059,916.90
5. Step 5: Solve for x
   x = 10,024,059,916.90/112,380.52
6. Step 6: Final answer
   x = 89,197.49