Finding the Fourth Proportional to 72,314.79, 99,791.42 and 42,100.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72,314.79 : 99,791.42 = 42,100.89 : x
2. Step 2: Convert to fraction form
   72,314.79/99,791.42 = 42,100.89/x
3. Step 3: Cross multiply
   72,314.79x = 99,791.42 × 42,100.89
4. Step 4: Simplify right side
   72,314.79x = 4,201,307,385.86
5. Step 5: Solve for x
   x = 4,201,307,385.86/72,314.79
6. Step 6: Final answer
   x = 58,097.48