Finding the Fourth Proportional to 78,417.80, 117,429.60 and 60,899.84

Step by Step Solution

1. Step 1: Write the proportion equation
   78,417.80 : 117,429.60 = 60,899.84 : x
2. Step 2: Convert to fraction form
   78,417.80/117,429.60 = 60,899.84/x
3. Step 3: Cross multiply
   78,417.80x = 117,429.60 × 60,899.84
4. Step 4: Simplify right side
   78,417.80x = 7,151,443,851.26
5. Step 5: Solve for x
   x = 7,151,443,851.26/78,417.80
6. Step 6: Final answer
   x = 91,196.69