Finding the Fourth Proportional to 112,902.81, 155,805.71 and 65,156.15

Step by Step Solution

1. Step 1: Write the proportion equation
   112,902.81 : 155,805.71 = 65,156.15 : x
2. Step 2: Convert to fraction form
   112,902.81/155,805.71 = 65,156.15/x
3. Step 3: Cross multiply
   112,902.81x = 155,805.71 × 65,156.15
4. Step 4: Simplify right side
   112,902.81x = 10,151,699,106.81
5. Step 5: Solve for x
   x = 10,151,699,106.81/112,902.81
6. Step 6: Final answer
   x = 89,915.38