Finding the Fourth Proportional to 78,004.83, 107,686.50 and 54,090

Step by Step Solution

1. Step 1: Write the proportion equation
   78,004.83 : 107,686.50 = 54,090 : x
2. Step 2: Convert to fraction form
   78,004.83/107,686.50 = 54,090/x
3. Step 3: Cross multiply
   78,004.83x = 107,686.50 × 54,090
4. Step 4: Simplify right side
   78,004.83x = 5,824,762,785
5. Step 5: Solve for x
   x = 5,824,762,785/78,004.83
6. Step 6: Final answer
   x = 74,671.82