Finding the Fourth Proportional to 139,677,670.15, 192,688,429.40 and 108,524,642.47

Step by Step Solution

1. Step 1: Write the proportion equation
   139,677,670.15 : 192,688,429.40 = 108,524,642.47 : x
2. Step 2: Convert to fraction form
   139,677,670.15/192,688,429.40 = 108,524,642.47/x
3. Step 3: Cross multiply
   139,677,670.15x = 192,688,429.40 × 108,524,642.47
4. Step 4: Simplify right side
   139,677,670.15x = 20,911,442,908,123,460
5. Step 5: Solve for x
   x = 20,911,442,908,123,460/139,677,670.15
6. Step 6: Final answer
   x = 149,712,140.00