Finding the Fourth Proportional to 103,090.79, 142,180.94 and 72,564.93

Step by Step Solution

1. Step 1: Write the proportion equation
   103,090.79 : 142,180.94 = 72,564.93 : x
2. Step 2: Convert to fraction form
   103,090.79/142,180.94 = 72,564.93/x
3. Step 3: Cross multiply
   103,090.79x = 142,180.94 × 72,564.93
4. Step 4: Simplify right side
   103,090.79x = 10,317,349,595.61
5. Step 5: Solve for x
   x = 10,317,349,595.61/103,090.79
6. Step 6: Final answer
   x = 100,080.23