Finding the Fourth Proportional to 78,131.01, 107,820.83 and 42,320.91

Step by Step Solution

1. Step 1: Write the proportion equation
   78,131.01 : 107,820.83 = 42,320.91 : x
2. Step 2: Convert to fraction form
   78,131.01/107,820.83 = 42,320.91/x
3. Step 3: Cross multiply
   78,131.01x = 107,820.83 × 42,320.91
4. Step 4: Simplify right side
   78,131.01x = 4,563,075,642.56
5. Step 5: Solve for x
   x = 4,563,075,642.56/78,131.01
6. Step 6: Final answer
   x = 58,402.88