Finding the Fourth Proportional to 78,696.61, 108,598.15 and 42,885.85

Step by Step Solution

1. Step 1: Write the proportion equation
   78,696.61 : 108,598.15 = 42,885.85 : x
2. Step 2: Convert to fraction form
   78,696.61/108,598.15 = 42,885.85/x
3. Step 3: Cross multiply
   78,696.61x = 108,598.15 × 42,885.85
4. Step 4: Simplify right side
   78,696.61x = 4,657,323,971.18
5. Step 5: Solve for x
   x = 4,657,323,971.18/78,696.61
6. Step 6: Final answer
   x = 59,180.74