Finding the Fourth Proportional to 78,611.74, 108,486.15 and 42,803.71

Step by Step Solution

1. Step 1: Write the proportion equation
   78,611.74 : 108,486.15 = 42,803.71 : x
2. Step 2: Convert to fraction form
   78,611.74/108,486.15 = 42,803.71/x
3. Step 3: Cross multiply
   78,611.74x = 108,486.15 × 42,803.71
4. Step 4: Simplify right side
   78,611.74x = 4,643,609,678.71
5. Step 5: Solve for x
   x = 4,643,609,678.71/78,611.74
6. Step 6: Final answer
   x = 59,070.18