Finding the Fourth Proportional to 112,564.78, 155,291.24 and 64,807.99

Step by Step Solution

1. Step 1: Write the proportion equation
   112,564.78 : 155,291.24 = 64,807.99 : x
2. Step 2: Convert to fraction form
   112,564.78/155,291.24 = 64,807.99/x
3. Step 3: Cross multiply
   112,564.78x = 155,291.24 × 64,807.99
4. Step 4: Simplify right side
   112,564.78x = 10,064,112,902.80
5. Step 5: Solve for x
   x = 10,064,112,902.80/112,564.78
6. Step 6: Final answer
   x = 89,407.30