Finding the Fourth Proportional to 139,303,274.58, 209,012,189.48 and 61,539,136.89

Step by Step Solution

1. Step 1: Write the proportion equation
   139,303,274.58 : 209,012,189.48 = 61,539,136.89 : x
2. Step 2: Convert to fraction form
   139,303,274.58/209,012,189.48 = 61,539,136.89/x
3. Step 3: Cross multiply
   139,303,274.58x = 209,012,189.48 × 61,539,136.89
4. Step 4: Simplify right side
   139,303,274.58x = 12,862,429,739,780,642
5. Step 5: Solve for x
   x = 12,862,429,739,780,642/139,303,274.58
6. Step 6: Final answer
   x = 92,334,008.50