Finding the Fourth Proportional to 101,020.61, 139,374.60 and 65,234.81

Step by Step Solution

1. Step 1: Write the proportion equation
   101,020.61 : 139,374.60 = 65,234.81 : x
2. Step 2: Convert to fraction form
   101,020.61/139,374.60 = 65,234.81/x
3. Step 3: Cross multiply
   101,020.61x = 139,374.60 × 65,234.81
4. Step 4: Simplify right side
   101,020.61x = 9,092,075,549.83
5. Step 5: Solve for x
   x = 9,092,075,549.83/101,020.61
6. Step 6: Final answer
   x = 90,002.18