Finding the Fourth Proportional to 111,215, 153,476.70 and 60,915.80

Step by Step Solution

1. Step 1: Write the proportion equation
   111,215 : 153,476.70 = 60,915.80 : x
2. Step 2: Convert to fraction form
   111,215/153,476.70 = 60,915.80/x
3. Step 3: Cross multiply
   111,215x = 153,476.70 × 60,915.80
4. Step 4: Simplify right side
   111,215x = 9,349,155,961.86
5. Step 5: Solve for x
   x = 9,349,155,961.86/111,215
6. Step 6: Final answer
   x = 84,063.80