Finding the Fourth Proportional to 78,543.74, 108,390.83 and 42,734.01

Step by Step Solution

1. Step 1: Write the proportion equation
   78,543.74 : 108,390.83 = 42,734.01 : x
2. Step 2: Convert to fraction form
   78,543.74/108,390.83 = 42,734.01/x
3. Step 3: Cross multiply
   78,543.74x = 108,390.83 × 42,734.01
4. Step 4: Simplify right side
   78,543.74x = 4,631,974,813.13
5. Step 5: Solve for x
   x = 4,631,974,813.13/78,543.74
6. Step 6: Final answer
   x = 58,973.19