Finding the Fourth Proportional to 139,143.01, 208,697.50 and 59,213.10

Step by Step Solution

1. Step 1: Write the proportion equation
   139,143.01 : 208,697.50 = 59,213.10 : x
2. Step 2: Convert to fraction form
   139,143.01/208,697.50 = 59,213.10/x
3. Step 3: Cross multiply
   139,143.01x = 208,697.50 × 59,213.10
4. Step 4: Simplify right side
   139,143.01x = 12,357,625,937.25
5. Step 5: Solve for x
   x = 12,357,625,937.25/139,143.01
6. Step 6: Final answer
   x = 88,812.41